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Quiz: SQL

36 questions. Each answer is checked when you pick it, with an explanation.

• SELECT and filtering — 10 questions
• Aggregation — 3 questions
• JOIN — 7 questions
• Subqueries, CTEs, set operations — 3 questions
• Changing data and transactions — 5 questions
• Database structure — 4 questions
• Window functions — 2 questions
• SQL in QA work — 2 questions