Establish a savepoint within the current transaction. The savepoint-name is an identifier that can be used in a ROLLBACK TRANSACTION statement. All savepoints are automatically released when a transaction
ends. See Savepoints within transactions.
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