TCL (Transaction Control Language): Consists of commands like Commit, Rollback, and Savepoint. Data Manipulation Language Essential SQL Operations Mastery of SQL queries is fundamental in managing a database effectively. SELECT retrieves data with precision, whereas INSERT inserts new records faster. ...
Understanding Database Normalization in SQL with Example Full Outer Join in SQL: A Comprehensive Guide Introduction to SQL Server SQL Server Naming Conventions and Standards What are the 5 Basic SQL Commands? (DDL, DML, DCL, TCL, DQL) Understanding Natural Join in SQL Sql Server 2019 New Featu...
Full Backup can be taken by using SQL Query, SQL Server Management Studio or by third party software such as Tivoli, Symantec etc. An example for taking a Full Backup as follows:- By using SQL Query:- use master;go Backup DatabaseAdventureWorksto disk=‘C:\AdventureWorks.bak’; By Using ...
Here is an example for the same: BEGIN TRANSACTION; DELETE FROM employees WHERE employee_id = 101; ROLLBACK; 102. How to find duplicate records in SQL? To find duplicate records, we can use a combination of GROUP BY and HAVING clause to check the count of records. Whenever the COUNT ...
TCL commands are used to manage transactions in the database. Examples include:COMMIT: Used to save all changes made during the current transaction. -- Example: Committing a transaction COMMIT; ROLLBACK: Used to undo changes made during the current transaction. -- Example: Rolling back a ...
For example, you can choose from features like point-in-time recovery, write-ahead logging, granular access controls, tablespaces, nested transactions, online backups, and multiversion concurrency control. Reliability and compliance Decades of development have helped make PostgreSQL extremely fault ...
This is known SQL Server issue. SQL Server doesn't allow to have the several result sets at the same connection by default (the same problem is actual also for Sybase ASE, MySQL, ...). The possible solutions for SQL Server: using MARS_Connection option. This is global option for the ...
For example, when users write a SQL query to fetch data, they don't need to outline the steps the database should take to gather that data; they describe what the result should look like. In data science and machine learning, SQL is used to create databases that store large data sets ...
PostgreSQL offers several solutions to ensure high availability for users, including shared disk failover, write-ahead log shipping, data partitioning and multiple replication methods. Tools like EDB Postgres Failover Manager provide automatic failover to ensure high availability by monitoring and iden...
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