Advanced – Cloud & Data Testing
Database Index – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A data structure that improves the speed of data retrieval operations on a database table at the cost of extra writes and storage.
In simple words
A lookup structure that makes SELECTs fast.
Exam tip
Missing indexes are the #1 cause of slow queries in production QA investigations.
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