SQLBeginner
SQL Basics
WHERE versus HAVING, NULL behaviour, pattern matching, constraints and safe query practice.
Ready to start?
- 7 questions
- ~5 mins
Answer order is shuffled each attempt. Your results are saved only in this browser.
What this quiz covers
Querying, filtering and constraints.
- Filtering
- NULL
- Sorting
- Aggregation
- Injection
- Pattern matching
- Constraints
SQL learning roadmap
See where this quiz fits from beginner to expert.
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How this works
Practice or exam mode
Practice mode explains each answer straight away. Exam mode holds all answers until you finish, then shows a full review.
Shuffled answer order
Options are shuffled on every attempt, so you learn the idea rather than the position of the right letter.
Timer, flags and skips
A timer runs while you play. Flag questions to revisit them, or skip and come back from the question navigator.
Saved on your device
Scores, streaks and topic accuracy are stored in your browser only. There is no account.