SQL Server : Rollback without BEGIN TRANSACTION
Is there a way we can rollback to previous state of the transaction using ROLLBACK without
delete from table1; ROLLBACK
The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION.
Any input would be of great help.
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To expand on gerrytans answer when you explicitly set IMPLICIT_TRANSACTIONS ON, you can use a ROLLBACK. See the MSDN doco related to this. Note that this isn’t the default autocommit transaction mode.
This allows me to run a statement like;
SET IMPLICIT_TRANSACTIONS ON INSERT INTO my_table (item_type, start_date_time) VALUES ('TEST', CURRENT_TIMESTAMP) ROLLBACK -- Shouldn't return the 'TEST' value inserted above. SELECT * FROM my_table ORDER BY start_date_time DESC
As SQL server error tells you — no you can’t. And many people would be curious why would you want that in the first place.
Keep in mind SQL server has an implicit transaction — that is for DML you issue without explicit BEGIN TRAN, SQL server will start and finish a transaction for you behind the screen.
A common usage of ROLLBACK is for error handling. If somewhere in the middle of the transaction you realize you cannot proceed further due to bad user input or other reason — then a reasonable action is to ROLLBACK to return to the starting point
The worst thing that can happen is leave your data state ‘somewhere in the middle’.
You must have a
BEGIN TRANSACTION before you can use the
ROLLBACK command. You can’t go back to the previous state.