SQL Quiz
Every SQL lesson ends with a 3-question quiz, and the "Test yourself" page collects them. Use it to spot-check what you've learnt.
How it works
- 3 multiple-choice questions per lesson.
- Score is recorded against your account if you're signed in.
- Wrong answers reveal a short explanation — read them, don't skip.
Boss quiz
After finishing every lesson in a section, a longer "boss quiz" unlocks. It samples every lesson in the section — passing it counts towards your certificate.
Tips for finishing fast
- Read the question once, then read it again before scanning options. Many wrong answers hinge on a missed "NOT" or "ONLY".
- If two options look identical, one of them has a tiny difference — that's the trick.
- Bookmark anything you got wrong. The flashcard system surfaces those topics first in spaced-repetition mode.
What the questions cover
| Bucket | Sample question |
|---|---|
| Syntax | Which clause filters groups after aggregation? |
| Behaviour | What does SUM over zero rows return? |
| Choice | For pagination on a 50M-row table, which is fastest? |
Tip: Quizzes test recognition; exercises test recall. Do both — they reinforce each other.
Example
Example
-- The 3-question 'Test yourself' quiz appears at the -- end of every lesson.Try it Yourself »
Exercise
Per-lesson quiz has how many questions?
questions
A single digit.
Discussion
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