← 🗄️ Databases & SQL
23 / 25
Lesson 23 — Transactions & rollback
All or nothing
BEGIN starts a transaction; ROLLBACK undoes it so partial changes never persist.
Why it matters: it keeps data consistent when something fails midway.
Not clear enough?
Task
Rollback the second insert and show only the first row.
🧠 Test your knowledge
A quick 3-question quiz on this lesson — instant feedback.
Keep going with Databases & SQL
Ready for more? These paid resources pick up where this lesson leaves off.
UdemyBestsellers
Top-rated Databases & SQL courses
Project-based Databases & SQL video courses — the perfect paid next step after these free lessons.
Browse on Udemy →AmazonReader picks
Best Databases & SQL books
Hand-picked Databases & SQL books to master the fundamentals offline.
See on Amazon →Some links on this page are affiliate links: we may earn a commission at no extra cost to you. We only recommend tools we believe are genuinely useful.