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SQL

SQL — ISNULL() Can Break Index Usage

- 29.12.25 - ErcanOPAK
WHERE ISNULL(Deleted, 0) = 0

❌ Effect

Index seek becomes scan.

✅ Fix

Rewrite conditions without functions.

Related posts:

SQL: Optimizing Multiple WHERE Clauses with Index Intersection

How to solve “A cursor with the name already exists” problem?

SQL Queries Return Correct Data Too Slowly

Post Views: 9

Post navigation

C# — List.ForEach() Is Slower Than foreach
SQL — ORDER BY Without Index Causes TempDB Spikes

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