Conditional Logic & CTEs

Construct conditional CASE expressions, sanitize missing records with COALESCE, modularize queries with Common Table Expressions (CTEs), and query with EXISTS.

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LESSON 29

🔓 CASE Expressions

⏱ 3 Mins • ⭐ 450 XP • Advanced

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LESSON 30

🔒 NULL Handling with COALESCE

⏱ 3 Mins • ⭐ 470 XP • Advanced

LESSON 31

🔒 Common Table Expressions

⏱ 3 Mins • ⭐ 490 XP • Advanced

LESSON 32

🔒 EXISTS & NOT EXISTS

⏱ 3 Mins • ⭐ 510 XP • Advanced

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