STOP Using DISTINCT for Performance ❌ | SQL Myth Every Developer Believes

Many developers think DISTINCT makes queries faster — but that’s a dangerous SQL myth 🚨
DISTINCT forces the database to sort or hash all rows, increasing time complexity and memory usage.
If you’re using DISTINCT to fix duplicates, your JOIN logic is probably wrong.
Real optimization starts with correct query design, not shortcuts.
Save this 💾 — asked frequently in SQL interviews!

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