SQL Database Concepts Question:
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Can you explain what are COMMIT and ROLLBACK in SQL?
Answer:
COMMIT statement is used to end the current transaction and once the COMMIT statement is exceucted the transaction will be permanent and undone.
Syntax: COMMIT;
Example:
BEGIN
UPDATE EmpDetails SET EmpName = ‘Arpit’ where Dept = ‘Developer’
COMMIT;
END;
ROLLBACK statement is used to end the current transaction and undone the changes which was made by that transaction.
Syntax: ROLLBACK [TO] Savepoint_name;
Example
BEGIN
Statement1;
SAVEPOINT mysavepoint;
BEGIN
Statement2;
EXCEPTION
WHEN OTHERS THEN
ROLLBACK TO mysavepoint;
Statement5;
END;
END;
Syntax: COMMIT;
Example:
BEGIN
UPDATE EmpDetails SET EmpName = ‘Arpit’ where Dept = ‘Developer’
COMMIT;
END;
ROLLBACK statement is used to end the current transaction and undone the changes which was made by that transaction.
Syntax: ROLLBACK [TO] Savepoint_name;
Example
BEGIN
Statement1;
SAVEPOINT mysavepoint;
BEGIN
Statement2;
EXCEPTION
WHEN OTHERS THEN
ROLLBACK TO mysavepoint;
Statement5;
END;
END;
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