SQL From Zero — everything this round asks for

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What is inside

• 1. What is actually examined
• 2. It is MySQL
• 3. The clause order — memorise this
• 4. JOIN — the only thing you need
• 5. WHERE — where the marks actually are
• 6. Aliases — the highest-ROI topic in this library
• 7. DISTINCT — the duplicate-row trap
• 8. GROUP BY, aggregates, and HAVING
• 9. Anti-joins — "find the ones with none"
• 10. The five-step method for the exam
• 11. Practice — 16 drills
• 12. What not to learn