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Computer Science
Undergraduate
SQL Placement Crash Course - Every Pattern That Gets Asked
SQL Placement Crash Course – 5 Days
A 5-day SQL revision guide for placements and interviews. Each day has short concept notes, examples and solved practice questions, with common mistakes pointed out.
What's inside:
• Day 1 – Filtering, sorting, aggregation, GROUP BY, WHERE vs HAVING, NULL traps
• Day 2 – All joins, self join, LEFT JOIN filter trap, NOT IN vs NOT EXISTS
• Day 3 – Subqueries (scalar, correlated, derived), CTEs, recursive CTE
• Day 4 – Window functions: RANK vs DENSE_RANK vs ROW_NUMBER, LAG/LEAD, running totals
• Day 5 – Gaps & islands, median, pivot with CASE WHEN, date and string patterns, rapid-fire theory table
• 19 solved practice questions + 10 mixed practice problems (without solutions)
• One-page quick revision cheat sheet
Who is it for: B.Tech / BCA / MCA students preparing for campus placements and coding rounds, and anyone revising SQL before interviews.
Note: Queries use MySQL-style syntax; some functions differ in other databases. Format: PDF.
What's included
✓ 10-page PDF document
✓ Instant download after purchase
✓ Lifetime access from your dashboard
✓ Mobile & desktop compatible
✓ Quality reviewed by CraftedDocs
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Rohan
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