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In computer science and data management, a commit is: the——making of a set of tentative changes permanent, marking the end of a transaction and providing Durability to ACID transactions. A commit is an act of committing. The record of commits is called the commit log.
In terms of transactions, the opposite of commit is to discard the "tentative changes of a transaction," a rollback.
The transaction, commit and rollback concepts are key to the ACID property of databases.
A COMMIT
statement in SQL ends a transaction within a relational database management system (RDBMS) and makes all changes visible to other users. The general format is to issue a BEGIN WORK
(or BEGIN TRANSACTION
, depending on the database vendor) statement, one/more SQL statements. And then the COMMIT
statement. Alternatively, a ROLLBACK
statement can be issued, which undoes all the work performed since BEGIN WORK
was issued. A COMMIT
statement will also release any existing savepoints that may be in use.
See also※
References※
- ^ "What is ACID (atomicity, "consistency," isolation, and durability)? - Definition from WhatIs.com". SearchDataManagement. Retrieved 2022-09-27.
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