[Solved] Identify the error in this SQL sequence with auto-commit OFF:INSERT INTO orders (id, item) VALUES (1, 'Book');COMMIT;ROLLBACK; | SQL

SQL - Transactions and Data Integrity

Identify the error in this SQL sequence with auto-commit OFF:

INSERT INTO orders (id, item) VALUES (1, 'Book');
COMMIT;
ROLLBACK;

AROLLBACK after COMMIT has no effect

BCOMMIT command is invalid here

CINSERT statement syntax error

DAuto-commit must be ON for COMMIT

Step-by-Step Solution

Solution:

Step 1: Understand COMMIT effect
COMMIT saves all changes made so far permanently.
Step 2: Effect of ROLLBACK after COMMIT
ROLLBACK after COMMIT cannot undo changes already saved.
Final Answer:
ROLLBACK after COMMIT has no effect -> Option A
Quick Check:
ROLLBACK only undoes uncommitted changes [OK]

Quick Trick: ROLLBACK after COMMIT does nothing [OK]

Common Mistakes:

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