Aikesheng Open Source Community
Jul 8, 2024 · Databases
Optimizing MySQL GROUP BY with Index Scans: Loose vs Tight Index Scan
This article explains how MySQL GROUP BY queries can be dramatically accelerated by using appropriate index scans, compares Loose Index Scan and Tight Index Scan, shows practical test data, execution plans, and provides guidelines for when each method is most effective.
GROUP BYLoose Index ScanSQL Optimization
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