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You execute these commands: CREATE TABLE customers (customer id INTEGER, customer name VARCHAR2 (20)); INSERT INTO customers VALUES (1,'Custmoer1 '); SAVEPOINT post insert; INSERT INTO customers VALUES (2, 'Customer2 '); <TODO> SELECTCOUNT (*) FROM customers; Which two, used independently, can replace <TODO> so the query retums 1?
Correct Answer: A,C
For the given SQL commands: Option A: ROLLBACK; A ROLLBACK will undo all changes made in the transaction up to the last COMMIT. Option C: ROLLBACK TO SAVEPOINT post_insert; ROLLBACK TO SAVEPOINT will undo changes back to the named savepoint, which in this case is after the first insert.