Covering Index


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

About the Author

Photo of Markus Winand
Markus Winand tunes developers for high SQL performance. He also published the book SQL Performance Explained and offers in-house training as well as remote coaching at http://winand.at/

?Recent questions at
Ask.Use-The-Index-Luke.com

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Join with inequalities only

Dec 16 at 12:06 Markus Winand ♦♦ 936
inequality join
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368
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PostgreSQL Scripts: Performance Testing and Scalability problem and question

Nov 12 at 14:53 Markus Winand ♦♦ 936
testing postgresql scalability
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994
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PostgreSQL Bitmap Heap Scan on index is very slow but Index Only Scan is fast

Oct 31 at 11:31 Markus Winand ♦♦ 936
index postgresql postgres sql