The ROLLBACK TRANSACTION statement undoes any changes that have been made since a savepoint was established using SAVE TRANSACTION.
Changes made before the SAVE TRANSACTION are not undone; they are still pending.
The savepoint-name is an identifier that was specified on a SAVE TRANSACTION statement within the current transaction. If savepoint-name is omitted, all outstanding changes are rolled back. Any savepoints since the named savepoint are automatically released.
There must be a corresponding SAVE TRANSACTION within the current transaction.
The following example displays five rows with values 10, 20, and so on. The effect of the DELETE, but not the prior INSERTs
or UPDATE, is undone by the ROLLBACK TRANSACTION statement.
SELECT row_num INTO #tmp
FROM sa_rowgenerator( 1, 5 )
UPDATE #tmp SET row_num=row_num*10
SAVE TRANSACTION before_delete
DELETE FROM #tmp WHERE row_num >= 3
ROLLBACK TRANSACTION before_delete
SELECT * FROM #tmp