How do I rollback changes in SQL?

Question

Add a transaction and try statement before and after the update statement. BEGIN TRY. BEGIN TRANSACTION. Select/update/delete. COMMIT TRANSACTION. END TRY. BEGIN CATCH. ROLLBACK TRANSACTION. -- Consider logging the error and then re-raise.

What is ROLLBACK in SQL with example?

ROLLBACK in SQL is a transactional control language that is used to undo the transactions that have not been saved in the database. The command is only been used to undo changes since the last COMMIT. Example: Consider the following STAFF table with records: STAFF.

Can you undo an update in SQL?

Undo is called rollback in SQL. Once you've done a commit , you can't undo it without getting into restoring backups. Note that doing a rollback will undo an entire transaction, which means every update, insert, and delete since the transaction began, which is usually since the last commit or rollback.

Can you ROLLBACK the changes saved in database?

Every time a transaction completes its execution without any interruption, the changes made to the database become permanent. This means that the database cannot retrieve its previous states. If the transaction enters into a committed state, it cannot be rolled back, and a new transaction starts.

How do you ROLLBACK a transaction?

Rolls back an explicit or implicit transaction to the beginning of the transaction, or to a savepoint inside the transaction. You can use ROLLBACK TRANSACTION to erase all data modifications made from the start of the transaction or to a savepoint. It also frees resources held by the transaction.

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