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SEQUENCES IN ORACLE SQL WITH EXAMPLES (asc, desc, cycle, nocycle, cache, nocache)
 
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This video tutorial is to understand the working of sequences in oracle SQL. The video demonstrations explain all the attributes of a create sequence statement such as start with, increment by, maxvalue, nomaxvalue, minvalue, nominvalue, cycle, nocycle, cache, nocache, order, and noorder. All the parameters are explained with appropriate examples so that the user can understand them clearly. For more detail refer to the link: http://plsqlnsql.blogspot.com/2017/01/sequences.html
Views: 2087 Kishan Mashru
SQL: Sequence Generator
 
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In this tutorial, you'll learn how to make use of sequence generator. PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 7), TimesTen in-memory database (since version 11.2.1), and IBM DB2 (since version 9.7).[1] Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database. PL/SQL includes procedural language elements such as conditions and loops. It allows declaration of constants and variables, procedures and functions, types and variables of those types, and triggers. It can handle exceptions (runtime errors). Arrays are supported involving the use of PL/SQL collections. Implementations from version 8 of Oracle Database onwards have included features associated with object-orientation. One can create PL/SQL units such as procedures, functions, packages, types, and triggers, which are stored in the database for reuse by applications that use any of the Oracle Database programmatic interfaces. PL/SQL works analogously to the embedded procedural languages associated with other relational databases. For example, Sybase ASE and Microsoft SQL Server have Transact-SQL, PostgreSQL has PL/pgSQL (which emulates PL/SQL to an extent), and IBM DB2 includes SQL Procedural Language,[2] which conforms to the ISO SQL’s SQL/PSM standard. The designers of PL/SQL modeled its syntax on that of Ada. Both Ada and PL/SQL have Pascal as a common ancestor, and so PL/SQL also resembles Pascal in several aspects. However, the structure of a PL/SQL package does not resemble the basic Object Pascal program structure as implemented by a Borland Delphi or Free Pascal unit. Programmers can define public and private global data-types, constants and static variables in a PL/SQL package.[3] PL/SQL also allows for the definition of classes and instantiating these as objects in PL/SQL code. This resembles usage in object-oriented programming languages like Object Pascal, C++ and Java. PL/SQL refers to a class as an "Abstract Data Type" (ADT) or "User Defined Type" (UDT), and defines it as an Oracle SQL data-type as opposed to a PL/SQL user-defined type, allowing its use in both the Oracle SQL Engine and the Oracle PL/SQL engine. The constructor and methods of an Abstract Data Type are written in PL/SQL. The resulting Abstract Data Type can operate as an object class in PL/SQL. Such objects can also persist as column values in Oracle database tables. PL/SQL is fundamentally distinct from Transact-SQL, despite superficial similarities. Porting code from one to the other usually involves non-trivial work, not only due to the differences in the feature sets of the two languages,[4] but also due to the very significant differences in the way Oracle and SQL Server deal with concurrency and locking. There are software tools available that claim to facilitate porting including Oracle Translation Scratch Editor,[5] CEITON MSSQL/Oracle Compiler [6] and SwisSQL.[7] The StepSqlite product is a PL/SQL compiler for the popular small database SQLite. PL/SQL Program Unit A PL/SQL program unit is one of the following: PL/SQL anonymous block, procedure, function, package specification, package body, trigger, type specification, type body, library. Program units are the PL/SQL source code that is compiled, developed and ultimately executed on the database. The basic unit of a PL/SQL source program is the block, which groups together related declarations and statements. A PL/SQL block is defined by the keywords DECLARE, BEGIN, EXCEPTION, and END. These keywords divide the block into a declarative part, an executable part, and an exception-handling part. The declaration section is optional and may be used to define and initialize constants and variables. If a variable is not initialized then it defaults to NULL value. The optional exception-handling part is used to handle run time errors. Only the executable part is required. A block can have a label. Package Packages are groups of conceptually linked functions, procedures, variables, PL/SQL table and record TYPE statements, constants, cursors etc. The use of packages promotes re-use of code. Packages are composed of the package specification and an optional package body. The specification is the interface to the application; it declares the types, variables, constants, exceptions, cursors, and subprograms available. The body fully defines cursors and subprograms, and so implements the specification. Two advantages of packages are: Modular approach, encapsulation/hiding of business logic, security, performance improvement, re-usability. They support object-oriented programming features like function overloading and encapsulation. Using package variables one can declare session level (scoped) variables, since variables declared in the package specification have a session scope.
Views: 7966 radhikaravikumar
SQL tutorial 61: SEQUENCE in Oracle Database By Manish Sharma RebellionRider
 
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This tutorial is all about Sequence In Oracle Database. In this SQL Tutorial you will learn How to create a sequence How to populate a Primary key column (auto increment in Oracle) using Sequence How to drop a sequence ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/sql-sequence-in-oracle-database-rebellionrider-manish-sharma Previous Tutorial ► How To Insert Data into Table using SQL Developer http://youtu.be/YYQCSV6MzTk ► INSERT INTO Command http://youtu.be/uQXgqFtxI_k ► How to copy /Insert data into a table from another table http://youtu.be/m3Ep8tAMqok ------------------------------------------------------------------------- ►►►Help Me In Getting A Job◄◄◄ ►Help Me In Getting A Good Job By Connecting With Me on My LinkedIn and Endorsing My Skills. All My Contact Info is Down Below. You Can Also Refer Me To Your Company Thanks ------------------------------------------------------------------------- Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=kb4rc1 -------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! -------------------------------------------------------------------------- Amazon Wishlist: http://bit.ly/wishlist-amazon ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at for E-mail address please check About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 42563 Manish Sharma
Cache Fusion Mechanism in Oracle RAC
 
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Cache Fusion is simply fusing or adding of cache memory so that the availability of the data will be increased and time to fetch a particular block will be decreased because the cache is shared from one instance to the other.
Views: 1931 Anonymous far
Sequence object in SQL Server 2012
 
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create sequence in sql server In this video we will discuss sequence object in SQL Server. Sequence object Introduced in SQL Server 2012 Generates sequence of numeric values in an ascending or descending order Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/sequence-object-in-sql-server-2012.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/sequence-object-in-sql-server-2012_26.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists Creating the Incrementing Sequence : The following code create a Sequence object that starts with 1 and increments by 1 CREATE SEQUENCE [dbo].[SequenceObject] AS INT START WITH 1 INCREMENT BY 1 Generating the Next Sequence Value : Now we have a sequence object created. To generate the sequence value use NEXT VALUE FOR clause SELECT NEXT VALUE FOR [dbo].[SequenceObject] Output : 1 Every time you execute the above query the sequence value will be incremented by 1. I executed the above query 5 times, so the current sequence value is 5. Retrieving the current sequence value : If you want to see what the current Sequence value before generating the next, use sys.sequences SELECT * FROM sys.sequences WHERE name = 'SequenceObject' Alter the Sequence object to reset the sequence value : ALTER SEQUENCE [SequenceObject] RESTART WITH 1 Select the next sequence value to make sure the value starts from 1 SELECT NEXT VALUE FOR [dbo].[SequenceObject] Using sequence value in an INSERT query : CREATE TABLE Employees ( Id INT PRIMARY KEY, Name NVARCHAR(50), Gender NVARCHAR(10) ) -- Generate and insert Sequence values INSERT INTO Employees VALUES (NEXT VALUE for [dbo].[SequenceObject], 'Ben', 'Male') INSERT INTO Employees VALUES (NEXT VALUE for [dbo].[SequenceObject], 'Sara', 'Female') -- Select the data from the table SELECT * FROM Employees Creating the decrementing Sequence : The following code create a Sequence object that starts with 100 and decrements by 1 CREATE SEQUENCE [dbo].[SequenceObject] AS INT START WITH 100 INCREMENT BY -1 Specifying MIN and MAX values for the sequence : Use the MINVALUE and MAXVALUE arguments to specify the MIN and MAX values respectively. Step 1 : Create the Sequence object CREATE SEQUENCE [dbo].[SequenceObject] START WITH 100 INCREMENT BY 10 MINVALUE 100 MAXVALUE 150 Step 2 : Retrieve the next sequence value. The sequence value starts at 100. Every time we call NEXT VALUE, the value will be incremented by 10. SELECT NEXT VALUE FOR [dbo].[SequenceObject] If you call NEXT VALUE, when the value reaches 150 (MAXVALUE), you will get the following error The sequence object 'SequenceObject' has reached its minimum or maximum value. Restart the sequence object to allow new values to be generated. Recycling Sequence values : When the sequence object has reached it's maximum value, and if you want to restart from the minimum value, set CYCLE option ALTER SEQUENCE [dbo].[SequenceObject] INCREMENT BY 10 MINVALUE 100 MAXVALUE 150 CYCLE At this point, whe the sequence object has reached it's maximum value, and if you ask for the NEXT VALUE, sequence object starts from the minimum value again which in this case is 100. To improve performance, the Sequence object values can be cached using the CACHE option. When the values are cached they are read from the memory instead of from the disk, which improves the performance. When the cache option is specified you can also specify the size of th cache , that is the number of values to cache. The following example, creates the sequence object with 10 values cached. When the 11th value is requested, the next 10 values will be cached again. CREATE SEQUENCE [dbo].[SequenceObject] START WITH 1 INCREMENT BY 1 CACHE 10 Using SQL Server Graphical User Interface (GUI) to create the sequence object : 1. Expand the database folder 2. Expand Programmability folder 3. Right click on Sequences folder 4. Select New Sequence Next video : Difference between SEQUENCE and IDENTITY in SQL Server
Views: 34864 kudvenkat
Redo Logs in an Oracle Database - DBArch Video 11
 
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This video explains the concepts of Redo Log Groups and Files in an Oracle Database. You will understand how Oracle Instance uses Redo Buffers and Logwriter to keep the redo in Redo Logs. Our Upcoming Online Course Schedule is available in the url below https://docs.google.com/spreadsheets/d/1qKpKf32Zn_SSvbeDblv2UCjvtHIS1ad2_VXHh2m08yY/edit#gid=0 Reach us at [email protected]
Views: 16468 Ramkumar Swaminathan
Oracle Architecture
 
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This video describes the best architecture of the oracle after trying more than times to Oracle structure I decided to produce an animated video let's start first with the database structure on the left side you have the client here on the right side you have to serve a two-year the server side is divided in three main structures to memory the logical structure and the physical structure so let's use SQL Plus application to provide you every step up a transaction will be using Scott sample schema it is important to note that the whole string is an alias and not a database name district will be compared to this alias inside of a file called pianist named doc or this file is similar to a DNS and with up pain all the necessary detail to reach a database server locally a user process will be allocated and will validate the connection through a listener the listener will be in charge to allocate a server process the user processes da link to the server process let's now execute our first transaction for this example we will execute an update first to state that will be validated we call this step the parsing this server process sense back to confirmation of the parsing that statement with be written into their share pool and the redo log buffer an execution plan will also be created it to the fair share Paul that database book they choose fought the transaction will be read and copy into the database buffer cache only that feel implicated in that transaction will be held it to a - segment till the transaction is completed we call those copies the before image a copy of this block will be duplicated with the updated feel this copy is called me after image a confirmation will be sent to to use a process the commit statement will complete the transaction and will be written into to redo log buffer to commit statement triggers the log writer process and we'll send all statement for the current transaction into the redo log file the before image into undo segment could be then deleted went that threshold up to undo retention parameters reach alaskan from Asian will be sent to the user process went to current law kiss Paul it generates a switch lock triggering at the same time the archiver process and to log sequence number the archiver will generate and archive the file with the content of the current loc a switch up with them trigger a checkpoint process that will incriminate the checkpoint number by applying this last number into each data file header the checkpoint process with finally trigger the database writer process enright the last image from that database buffer cache into thirty people
Views: 20357 Ezylearning
Oracle 11gR2 RAC DEMO
 
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Demonstration on Oracle 11gR2 RAC training.
Views: 2012 OrSkl Academy
Oracle Tutorial in Hindi - How to Multiplex/Mirror a Redo Log File of an Oracle Database
 
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How to Multiplex/Mirror a Redo Log File of an Oracle Database... #Oracletutorialforbeginners #rmanrecoverytutoria #Oracletutorial11g #Multiplex/MirroraRedoLogFile by Lalit Saini....
Views: 5513 Oracle World
Module 1- Introduction to Oracle Database
 
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Hello viewers, We are starting our section on professional courses and for which we are starting our course material which is based on the Oracle Database, Please refer to the description below for knowing which topics will be covered in Oracle DBA Installation Module 1 – Introduction to Database • Introduction to Database • How ORACLE DB does it • Unix kernal Module 2 – Physical Database Structure • Physical Database Structure • Control files • Key information of files • Redo log files Module 3 – Oracle Storage structures • Oracle Storage structures • Table statement • How to check “create table” • Schemas and schema objects • Data blocks • Extents • Segments Module 4 – Memory & Process Architecture • Memory & Process Architecture • Instance/Memory structures • Shared pool • Buffer Cache • Redo Log Buffer • Process Architecture • Background process Module 5 – Background Process, Alert & Trace files • Background Process, Alert & Trace files • Alert • Trace files Module 6 – Database Startup & Serving User Requests • Database Startup & Serving User Requests • Offline backup • Standby Database Module 12 – Oracle Recovery Manager (RMAN) • Oracle Recovery Manager (RMAN) • Data pump export & import • SQL loader • External table Module 13 – Data dictionary & Dynamic Performance Tables • Data dictionary & Dynamic Performance Tables • Dynamic performance Tables • Typical day ORACLE DBA Module 14 – Introduction to Database Tuning • Introduction to Database Tuning • Monitor space usage • Monitor SQL scripts • Data base tuning • SQL tuning • Table Statistics • Index statistics • Index Selectivity • Chained Rows • Locks Module 15 – Introduction to Database Tuning Continued • Introduction to Database Tuning Continued • Tuning Shared pool • Data dictionary performance • Data dictionary tuning • PL/SQL code • Code reuse • Data base Buffer • Buffer cache hit Ratio • Code reuse • Database Startup • User process, Server process Module 7 – Database Security • Database Security • Process of “Create User” • Alter & Drop User • Resource Limits & profiles • Auditing Module 8 – Schema Objects • Schema Objects • Types of schema objects • How table data is stored • Temporary Tables • External Tables Module 9 – Schema Object Continued • Schema Object Continued • Materialized View • Sequence Generator • Indexes • B-Tree index structure • Cluster/Hash Cluster • Data concurrency & consistency • Locking • Deadlocks Module 10 – Oracle Network Environment • Oracle Network Environment • How to connect your database • Network environment of ORACLE • Database link Module 11 – Oracle Backup & Recovery Concepts • Oracle Backup & Recovery Concepts • Standby database • Testing • Media recovery options so in today's video, we will be discussing Module -1 The Introduction to Oracle Database. ----------------------------------------------------------------------------------------------------------- For downloading notes in PDF format please visit my Blog https://thedynamicstudy.blogspot.com/ ---------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------- Please go through the video and don't forget to share your views and subscribe the channel to keep the content open and reachable to students. ---------------------------------------------------------------------------------------------------- keep on watching, keep on learning! #dynamicstudy -~-~~-~~~-~~-~- Please watch: "OCTAPACE - Detailed Explanation in Hindi" https://www.youtube.com/watch?v=f_4WET6y49c -~-~~-~~~-~~-~-
Views: 46 Dynamic Study
La Database Buffer  Cache de la base de données Oracle
 
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http://docs.oracle.com/cd/E25178_01/server.1111/e25789/memory.htm http://docs.oracle.com/cd/E25178_01/server.1111/e25789/memory.htm http://blog.gerwinhendriksen.com/?p=78 http://itsiti.com/oracle-sga-memory-data-structure http://guyharrison.squarespace.com/ssdguide/03-the-oracle-database-flash-cache.html http://oraclegurukul.blogspot.fr/2012/07/db-buffer-cache.html https://www.toadworld.com/platforms/oracle/w/wiki/551.buffer-cache-overview https://mwidlake.wordpress.com/2011/08/08/iot-part-4-greatly-boosting-buffer-cache-efficiency/ https://www.facebook.com/foalenglowe.rene
Views: 33 FOALENG LOWE Rene
PL/SQL tutorial 65: PL/SQL Collection Method EXTEND in Oracle Database
 
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RebellionRider presents the PL/SQL Collection Method Extend in Oracle Database with Example by Manish Sharma. ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/col-method-extend ► PL/SQL Collection Method EXTEND https://youtu.be/QLP9xq5l_oA ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ------------------------------------------------------------------------- ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 4985 Manish Sharma
Curso de Oracle (Tuning) 05 - Trabalhando com o Library Cache
 
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Curso Oracle PL/SQL Essentials http://bit.ly/1N3upVn Curso Oracle SQL Expert - Certificação 1Z0-047 http://bit.ly/1G4rKWG Curso Oracle Aprendendo SQL - Preparatório exames 1Z0-051/1Z0-061 http://bit.ly/1eqDlsr Curso de Administração de Redes de Computadores http://goo.gl/nXjaXS Neste curso de Tuning no Oracle você irá aprender os principais conceitos de tuning no oracle melhorando consideravelmente as aplicações em ambientes de produção. No Curso de Tuning no Oracle você será direcionado passo a passo durante o aprendizado com ótima qualidade do conteúdo disponibilizado. Este curso é oferecido gratuitamente aqui porém caso tenha interesse em se aprofundar e aprender o oracle a fundo praparando para certificação acesse os links acima. Também acesse o link de administração de redes de computadores para mais conhecimento nesta área tornando-se um profissional completo. http://youtu.be/sTr8mHaBY2k Tags: Oracle Curso de Oracle Curso de banco de dados Tuning Cursos gratuitos
Views: 850 Cursos Interativos
قواعد البيانات 11 (Background Process 2 -DBWR,LGWR (Oracle DBA 11g Tutorial
 
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Oracle DBA 11g Tutorial Background Process part 2 (DBWR,LGWR,CKPT,ARCH) oracle database writer background process dbwr log writer background process lgwr checkpoint background process ckpt archive process
Views: 455 Ahmed Ybat
Reload data into cache automatically when data in the table changes   Part 132
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2013/02/reload-data-into-cache-automatically.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-132-reload-data-into-cache.html All ASP .NET Text Articles http://csharp-video-tutorials.blogspot.com/p/free-aspnet-video-tutorial.html All ASP .NET Slides http://csharp-video-tutorials.blogspot.com/p/aspnet-slides.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In Part 130 of asp.net video tutorial, we discussed about reloading data into cache automatically, when the xml file from which the data was initially retrieved, has changed. In this video, we will discuss about reloading data into cache automatically when data in the underlying database table has changed. Please watch Part 131, before proceeding with this video. To load data automatically into cache, when cached data is removed, we need to define a callback method. This callback method will be invoked when the respective item is removed from cache. So, the code to reload and re-cache data can be written in this method. The callback method signature should match, with the signature of "CacheItemRemovedCallback" delegate. The call back method is defined below. public void CacheItemRemovedCallbackMethod(string key, object value, CacheItemRemovedReason reason) { string CS = ConfigurationManager.ConnectionStrings["DBConnectionString"].ConnectionString; SqlConnection con = new SqlConnection(CS); SqlDataAdapter da = new SqlDataAdapter("spGetProducts", con); da.SelectCommand.CommandType = CommandType.StoredProcedure; DataSet ds = new DataSet(); da.Fill(ds); CacheItemRemovedCallback onCacheItemRemoved = new CacheItemRemovedCallback(CacheItemRemovedCallbackMethod); SqlCacheDependency sqlDependency = new SqlCacheDependency("Sample", "tblProducts"); Cache.Insert("ProductsData", ds, sqlDependency, DateTime.Now.AddHours(24), Cache.NoSlidingExpiration, CacheItemPriority.Default, onCacheItemRemoved); } Now, create an instance of "CacheItemRemovedCallback" delegate, and to the contructor pass the name of the callback method, that should be executed automatically when, the cached item is removed. CacheItemRemovedCallback onCacheItemRemoved = new CacheItemRemovedCallback(CacheItemRemovedCallbackMethod); In Part 131, to cache data, we used cache object's, Insert() method that takes 3 parameters, as shown below. Cache.Insert("ProductsData", ds, sqlDependency); Instead, let's use the overloaded version that takes 7 parameters and pass "onCacheItemRemoved" as an argument for "CacheItemRemovedCallback" parameter. Cache.Insert("ProductsData", ds, sqlDependency, DateTime.Now.AddHours(24), Cache.NoSlidingExpiration, CacheItemPriority.Default, onCacheItemRemoved); That's it. We are done. Now, please run the application. When "Get Data" button is clicked for the first time, the data is loaded from database. Once the data is loaded into cache, we always get it from cache when we click "Get Data". Now, execute an update statement on the database table. Notice that, when we click "Get Data" button now, we still get data from cache, but notice that, the updated data is loaded.
Views: 38781 kudvenkat
dba interview questions & answer in oracle | Ten Minute Code
 
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Top Oracle DBA Interview Questions & Answer 1. Oracle DBA Characteristics Criteria Result Main storage structures Logical and Physical Architecture Grid architecture ACID Compliance Fully compliant Data stored as Data blocks, extents, segments and table spaces 2. What is Oracle? Oracle is a company. Oracle is also a database server, which manages data in a very structured way. It allows users to store and retrieve related data in a multi user environment so that many users can concurrently access the same data. All this is accomplished while delivering high performance. A database server also prevents unauthorized access and provides efficient solutions for failure recovery. A standby database is a database replica created by taking a backup of a primary database. 3. What is a Oracle Database? Oracle provides software to create and manage the Oracle database. The database consists of physical and logical structures in which system, user, and control information is stored. The software that manages the database is called the Oracle database server. Collectively, the software that runs oracle and the physical database are called the Oracle database system. A database buffer cache stores the data in memory for quicker access. The redo logs track and store all the changes made to the database. A Data Guard ensures data protection and high availability of data and control file records the physical structure of the database. Click on the above link to read more and to become a Oracle DBA. 4. What are the roles of DBA? DBA has the authority to create new users, remove existing users or modify any of the environment variables or privileges assigned to other users. • Manage database storage • Administer users and security • Manage schema objects • Monitor and manage database performance • Perform backup and recovery • Schedule and automate jobs 5. What are different Oracle database objects? • TABLES • VIEWS • INDEXES • SYNONYMS • SEQUENCES • TABLESPACES 6. What are the benefits of ORDBMS? The objects as such can be stored in the database. The language of the DBMS can be integrated with an object- oriented programming language. The language may even be exactly the same as that used in the application, which does not force the programmer to have two representations of his objects. 7. What is an Oracle index? An index is an optional structure associated with a table to have direct access to rows, which can be created to increase the performance of data retrieval. Index can be created on one or more columns of a table. 8. What are the Common Oracle DBA Tasks? As an Oracle DBA, you can expect to be involved in the following tasks: • Installing Oracle software • Creating Oracle databases • Performing upgrades of the database and software to new release levels • Starting up and shutting down the database • Managing the database’s storage structures • Managing users and security • Managing schema objects, such as tables, indexes, and views • Making database backups and performing recovery when necessary • Proactively monitoring the database’s health and taking preventive or corrective action as required • Monitoring and tuning performance In a small to midsize database environment, you might be the sole person performing these tasks. In large enterprise environments, the job is often divided among several DBAs, each with their own area of specialty, such as the database security administrator or database tuning expert. 9. List out the Tools for Administering the Database? The following are some of the products, tools, and utilities you can use in achieving your goals as a database administrator. -Oracle Universal Installer (OUI) The Oracle Universal Installer installs your Oracle software and options. It can automatically launch the Database Configuration Assistant to install a database. -Database Configuration Assistant (DBCA) The Database Configuration Assistant creates a database from templates that are Oracle supplied, or you can create your own. It enables you to copy a preconfigured seed database, thus saving the time and effort of customizing and generating a database from scratch. -Database Upgrade Assistant This tool guides you through the upgrade of your existing database to a new Oracle release. -Oracle Net Manager This tool guides you through your Oracle Net network configuration. -Oracle Enterprise Manager The primary tool for managing your database is Oracle Enterprise Manager, a web-based interface. After you have installed the Oracle software, created or upgraded a database, and configured the network, you can use Oracle Enterprise Manager as the single interface for managing your database. In addition, Oracle Enterprise Manager also provides an interface for performance advisors and an interface for Oracle utilities such as SQL*Loader and Recovery Manager.
Views: 389 Together Oracle
SCPT 21: Oracle Back Ground Processes ( CKPT, DBWR, LGWR, ARCH)
 
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Oracle DBA Tutorials For Full Course Experience Please Go To http://mentorsnet.org/course_preview?course_id=6 Full Course Experience Includes 1. Access to course videos and exercises 2. View & manage your progress/pace 3. In-class projects and code reviews 4. Personal guidance from your Mentors
Views: 59512 Oresoft LWC
Request a Free Workspace APEX 18.1 - [Video 01 - English Version]
 
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Oracle Application Express: https://apex.oracle.com/en/learn/getting-started/ My Blog: (Spanish): http://descubriendooracle.blogspot.com/ Website: http://clartechsolutions.com/ Academy: https://clartechacademy.com/ LinkedIn: https://www.linkedin.com/in/cjmamanorfali/ Twitter: @Clari707
How to reszie the redolog file
 
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In this video i'm going to demonstrate you how to resize the redolog file step by step, this is only one method to resize the redolog file.
Views: 2280 OCP Technology
Oracle DB 12c - Indexes Enhancements
 
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Oracle DB 12c - Indexes Enhancements Watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjabi, Tutorials Point India Private Limited
SCPT 42: What is redo and undo in Oracle
 
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Oracle DBA Tutorials For Full Course Experience Please Go To http://mentorsnet.org/course_preview?course_id=6 Full Course Experience Includes 1. Access to course videos and exercises 2. View & manage your progress/pace 3. In-class projects and code reviews 4. Personal guidance from your Mentors
Views: 26507 Oresoft LWC
SCPT 8: Redo Log Files
 
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Oracle DBA Tutorials For Full Course Experience Please Go To http://mentorsnet.org/course_preview?course_id=6 Full Course Experience Includes 1. Access to course videos and exercises 2. View & manage your progress/pace 3. In-class projects and code reviews 4. Personal guidance from your Mentors
Views: 50567 Oresoft LWC
Real-World Performance - 15 - Index Contention
 
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Check out the entire series on the Oracle Learning Library at http://www.oracle.com/goto/oll/rwp In this video, listen and watch Andrew Holdsworth, Vice President of Oracle Database Real-World Performance at Oracle Corporation, as he explains how index contention affects performance. Copyright © 2014 Oracle and/or its affiliates. Oracle® is a registered trademark of Oracle and/or its affiliates. All rights reserved. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the "Materials"). The Materials are provided "as is" without any warranty of any kind, either express or implied, including without limitation warranties of merchantability, fitness for a particular purpose, and non-infringement.
Oracle Database 18c Technical Architecture Part-4
 
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Oracle Database 18c: Large Pool and database buffer cache. For more details on Oracle Courses pls visit https://www.koenig-solutions.com/oracle-training-certification-courses.aspx
Views: 140 Koenig Solutions
Incomplete Database Recovery when redo logs missing in Oracle
 
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By Vivek Saxena Insa Shabad Coachings Shamli If redo logs missing then 1st perform recovery until cancel then alter database open resetlogs //First check automatic archival enabled Archive log list Shut immediate //Delete redo logs Startup //Error ORA-00313 open failed for members of logs group 1 of thread 1 //ORA-00312 Online log 1 thread 1 Recover database until cancel; Alter database open resetlogs;
scpt part 9: train sequence
 
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i despise this level... (DX)
Views: 1036 teambrownie1
DB2 Basics Tutorial  Part 1
 
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DB2 Basics Tutorial Part 1
Views: 43430 db2 nix
What is REVERSE INDEX? What does REVERSE INDEX mean? REVERSE INDEX meaning & explanation
 
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What is REVERSE INDEX? What does REVERSE INDEX mean? REVERSE INDEX meaning - REVERSE INDEX definition - REVERSE INDEX explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Database management systems provide multiple types of indexes to improve performance and data integrity across diverse applications. Index types include b-trees, bitmaps, and r-trees. In database management systems, a reverse key index strategy reverses the key value before entering it in the index. E.g., the value 24538 becomes 83542 in the index. Reversing the key value is particularly useful for indexing data such as sequence numbers, where each new key value is greater than the prior value, i.e., values monotonically increase. Reverse key indexes have become particularly important in high volume transaction processing systems because they reduce contention for index blocks. Reversed key indexes use b-tree structures, but preprocess key values before inserting them. Simplifying, b-trees place similar values on a single index block, e.g., storing 24538 on the same block as 24539. This makes them efficient both for looking up a specific value and for finding values within a range. However if the application inserts values in sequence, each insert must have access to the newest block in the index in order to add the new value. If many users attempt to insert at the same time, they all must write to that block and have to get in line, slowing down the application. This is particularly a problem in clustered databases, which may require the block to be copied from one computer's memory to another's to allow the next user to perform their insert. Reversing the key spreads similar new values across the entire index instead of concentrating them in any one leaf block. This means that 24538 appears on the same block as 14538 while 24539 goes to a different block, eliminating this cause of contention. (Since 14538 would have been created long before 24538, their inserts don't interfere with each other.) Reverse indexes are just as efficient as unreversed indexes for finding specific values, although they aren't helpful for range queries. Range queries are uncommon for artificial values such as sequence numbers. When searching the index, the query processor simply reverses the search target before looking it up. Typically, applications delete data that is older on average before deleting newer data. Thus, data with lower sequence numbers generally go before those with higher values. As time passes, in standard b-trees, index blocks for lower values end up containing few values, with a commensurate increase in unused space, referred to as "rot". Rot not only wastes space, but slows query speeds, because a smaller fraction of a rotten index's blocks fit in memory at any one time. In a b-tree, if 14538 gets deleted, its index space remains empty. In a reverse index, if 14538 goes before 24538 arrives, 24538 can reuse 14538's space.
Views: 772 The Audiopedia
How to drop a redolog member & group in Oracle 10g, 11g, 12c
 
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How to drop a redolog member & group in Oracle 10g, 11g, 12c
Views: 365 Tasfique Ahmed
Tutoriel Oracle DBA1 (31) : Le processus DBWR (DataBase WRiter).
 
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Bonjour, Abonnez-vous à Sybaway : http://goo.gl/dBJO13 Plus de tutoriels : http://goo.gl/Ut31RF Facebook : http://goo.gl/DC7AIA Twitter : http://goo.gl/PUrQga Sybaway
Views: 2205 Abdessamad HALLAL
Oracle Undo & Redo Explained
 
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Comparison Of Oracle Undo & Redo Database Checkpoints Transaction Commits
Views: 5484 John Boyle
Arquitetura-Oracle- Log Buffer
 
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Aula exemplo para 2014...
Views: 196 Marcio Guimaraes
background process in oracle database
 
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background process in oracle database 10g and 11g
Views: 974 Sainora Annanagar
Logical query processing in SQL Server
 
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SQL Server processes code in a sequence which is known as the Logical Query Processing order. In a typical query, the logical processing order is : FROM, WHERE, GROUP BY, HAVING, SELECT, ORDER BY. Each step produces a virtual table that is used in the next step. The logical Query Processing order is different from the order in which the code is written ("keyed-in order") which would be SELECT, FROM, WHERE, GROUP BY, HAVING ,ORDER BY. Understanding the Logical Query Processing order is important as it can impact whether a query works or generates errors. I also have a comprehensive 60 minute T-SQL course available at Udemy : https://www.udemy.com/t-sql-for-data-analysts/?couponCode=ANALYTICS50%25OFF
Views: 8154 Steve Fox
DB2 Basics Tutorial Part 12 - DB CFG - Package cache/Sort Heap
 
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This tutorial talk about package cache and sort heap parameters.
Views: 1352 db2 nix
Alter Sequence in SQL Server Tamil
 
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Click here to Subscribe to IT PORT Channel : https://www.youtube.com/channel/UCMjmoppveJ3mwspLKXYbVlg In this video you can see how to alter Sequence Object in SQL Server Modifies the arguments of an existing sequence object. If the sequence was created with the CACHE option, altering the sequence will recreate the cache. Sequences objects are created by using the CREATE SEQUENCE statement. Sequences are integer values and can be of any data type that returns an integer. The data type cannot be changed by using the ALTER SEQUENCE statement. To change the data type, drop and create the sequence object. A sequence is a user-defined schema bound object that generates a sequence of numeric values according to a specification. New values are generated from a sequence by calling the NEXT VALUE FOR function
Views: 74 IT Port
AWS Redshift Tutorial For Beginners | Amazon Redshift Tutorial | AWS Training Video | Simplilearn
 
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This Amazon Redshift tutorial will help you understand the different features offered by AWS Redshift. Amazon Redshift is a fast, fully managed data warehouse that makes it simple and cost-effective to analyze all your data using standard SQL and your existing Business Intelligence (BI) tools. It allows you to run complex analytic queries against petabytes of structured data, using sophisticated query optimization, columnar storage on high-performance local disks, and massively parallel query execution. Most results come back in seconds. With Amazon Redshift, you can start small for just $0.25 per hour with no commitments and scale out to petabytes of data for $1,000 per terabyte per year, less than a tenth the cost of traditional solutions. Below topic are explained in this AWS Redshift Tutorial: -( 00:11 ) What is Amazon Redshift -( 00:29 ) LAP and Columns -( 01:18 ) Redshift Columnar Storage -( 01:49 ) Redshift Nodes -( 02:34 ) Limitations -( 02:58 ) Redshift Costs Amazon Redshift also includes Redshift Spectrum, allowing you to directly run SQL queries against exabytes of unstructured data in Amazon S3. No loading or transformation is required, and you can use open data formats, including CSV, TSV, Parquet, Sequence, and RCFile. Redshift Spectrum automatically scales query compute capacity based on the data being retrieved, so queries against Amazon S3 run fast, regardless of data set size. Subscribe to Simplilearn channel to get more AWS video updates: https://www.youtube.com/user/Simplilearn?sub_confirmation=1 Check our complete AWS Tutorial for beginners playlist here: https://www.youtube.com/watch?v=98ya1LiEU00&list=PLEiEAq2VkUULlNtIFhEQHo8gacvme35rz Cloud computing articles - https://www.simplilearn.com/resources/virtualization-and-cloud-computing?utm_campaign=AWS-ELB-Tutorial-YO4L_9poF3g&utm_medium=Tutorials&utm_source=youtube #AWSTutorial #AWSTrainingVideos #SimplilearnAWS #AWSCertification #AWSForBeginners #AWSRedShift To gain in-depth knowledge of Amazon Redshift and other AWS Amazon web services, check our AWS certification training course - https://www.simplilearn.com/cloud-computing/aws-solution-architect-associate-training?utm_campaign=AWS-Redshift-EcEB6Di_Mq8&utm_medium=Tutorials&utm_source=youtube - - - - - - - - - - - - - - About the Simplilearn AWS course: This AWS certification course will help you learn the key concepts, latest trends, and best practices for working with the AWS architecture – and become industry-ready aws certified solutions architect to help you qualify for a position as a high-quality AWS professional. Practice assignments and three live projects are designed to give you hands-on experience with the AWS management console. The course begins with an overview of the AWS platform before diving into its individual elements: IAM, VPC, EC2, EBS, ELB, CDN, S3, EIP, KMS, Route 53, RDS, Glacier, Snowball, Cloudfront, Dynamo DB, Redshift, Auto Scaling, Cloudwatch, Elastic Cache, CloudTrail, and Security.. By the end of this AWS training course you will be able to: 1. Formulate solution plans and provide guidance on AWS architectural best practices 2. Design and deploy scalable, highly available, and fault tolerant systems on AWS 3. Identify the lift and shift of an existing on-premises application to AWS 4. Decipher the ingress and egress of data to and from AWS 5. Select the appropriate AWS service based on data, compute, database, or security requirements 6. Estimate AWS costs and identify cost control mechanisms - - - - - - - - - - - - - - Who should go for this AWS course? This course is ideal for professionals who want to pursue a career in Cloud computing or develop Cloud applications with AWS. You’ll become an asset to any organization, helping leverage best practices around advanced cloud based solutions and migrate existing workloads to the cloud. - - - - - - - - - - - - - - Following projects are covered in this AWS course: Project 1 Create a custom VPC with public and private subnets on two availability zones and launch instances into each subnet. Project 2 Launch two web servers and configure a load balancer and auto scaling. Project 3 Configure RD Gateway on a VPC with a public and private subnet. - - - - - - - - - - - - - - For more updates on courses and tips follow us on: - Facebook : https://www.facebook.com/Simplilearn - Twitter: https://twitter.com/simplilearn - LinkedIn: https://www.linkedin.com/company/simplilearn - Website: https://www.simplilearn.com Get the android app: http://bit.ly/1WlVo4u Get the iOS app: http://apple.co/1HIO5J0
Views: 15497 Simplilearn
SQL PLAN MANAGMENT
 
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Proyecto final de administración de bases de datos relacionales II
Views: 447 César Retana
Assassin's Creed Chronicles INDIA "Oracle Room" Part 4
 
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Views: 75 Amitkan22
DB2 Basics Tutorial Part 15 - Tablespaces
 
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Types of tablespaces and extentsize
Views: 3345 db2 nix
Interesting fact on reading data from GV$ views in RAC
 
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How data is fetched from GV$ views in oracle RAC
Views: 849 OrSkl Academy