COMMIT - MySQL

Overview

The COMMIT command in MySQL finalizes a transaction. It makes all changes made within the transaction permanent in the database. It is typically used at the end of a transaction to ensure that data modifications are not lost if a system failure occurs.

Syntax

COMMIT

Options/Flags

None

Examples

Basic Usage

To commit a transaction, simply execute the COMMIT command:

BEGIN;
-- Execute SQL statements to modify data
COMMIT;

Nested Transactions

COMMIT can be used within nested transactions. Inner COMMIT statements commit only the inner transaction, while the outermost COMMIT commits the entire transaction:

BEGIN;
BEGIN;
-- Execute SQL statements
COMMIT;
-- Execute more SQL statements
COMMIT;

Common Issues

Uncommitted Changes

If a system failure occurs before COMMIT is executed, any uncommitted changes will be lost. Ensure that COMMIT is called promptly after data modifications to minimize the risk of data loss.

Integration

COMMIT is typically used in conjunction with the BEGIN and ROLLBACK commands to manage transactions. It can also be used within stored procedures and triggers to control transaction boundaries.

Related Commands

• BEGIN: Starts a transaction.
• ROLLBACK: Rolls back a transaction, discarding all changes made within it.
• SAVEPOINT: Creates a savepoint within a transaction, allowing for rollback to a specific point.