Covering Index


An index, when used for an index-only scan.

About the Author

As an author, trainer, and coach Markus Winand specializes in helping developers cope with SQL performance issues. He also published the book SQL Performance Explained and tweets his best performance tips via @SQLPerfTips.http://winand.at/

Recent Questions at Ask.Use-The-Index-Luke.com

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We want to buy the book but I can't

Jul 18 at 21:36 Markus Winand ♦♦ 541
book
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Performance very bad in Postgresql 9.3

Jul 08 at 11:54 Markus Winand ♦♦ 541
performance issue