Which commands are core Transaction Control Language (TCL)?

Problem Statement

Explanation

TCL manages the unit of work. COMMIT makes changes permanent. ROLLBACK undoes the unit. SAVEPOINT lets you roll back partway. DDL often auto-commits in some engines. Be mindful of boundaries so side effects are predictable.

Code Solution

SolutionRead Only

BEGIN;
UPDATE accounts SET bal=bal-100 WHERE id=1;
SAVEPOINT s1;
UPDATE accounts SET bal=bal+100 WHERE id=2;
ROLLBACK TO s1; -- optional
COMMIT;

Practice Sets

This question appears in the following practice sets:

Transactions, Concurrency & Isolation

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Which commands are core Transaction Control Language (TCL)?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

Which commands are core Transaction Control Language (TCL)?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime