Define commit, rollback and savepoint

Question: Define commit, rollback and savepoint.

1. COMMIT:

   If everything is in order with all statements within a single transaction, all changes are recorded together in the database is called committed. The COMMIT command saves all the transactions to the database since the last COMMIT or ROLLBACK command.

Syntax:

COMMIT;

2. ROLLBACK:

   If any error occurs with any of the SQL grouped statements, all changes need to be aborted. The process of reversing changes is called rollback. This command can only be used to undo transactions since the last COMMIT or ROLLBACK command was issued.

Syntax:

ROLLBACK;

3. SAVEPOINT:

   Creates points within the groups of transactions in which to ROLLBACK.

A SAVEPOINT is a point in a transaction in which you can roll the transaction back to a certain point without rolling back the entire transaction.

Syntax for Savepoint command:

SAVEPOINT SAVEPOINT_NAME;

This command is used only in the creation of SAVEPOINT among all the transactions.

In general ROLLBACK is used to undo a group of transactions.

Syntax for rolling back to Savepoint command:

ROLLBACK TO SAVEPOINT_NAME;

you can ROLLBACK to any SAVEPOINT at any time to return the appropriate data to its original state.