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Principles of SQL statement optimization
Upload User: lilian968
Upload Date: 2024-12-07
Package size: 35k
Downloads: 0
Detail: 1. Use indexes to traverse tables faster\ The index established by default is a non clustered index, but sometimes it is not optimal. Under non clustered index
, data is physically randomly stored on data pages. A reasonable index design should be based on the analysis and prediction of various queries by
. Generally speaking, columns with a large number of duplicate values and frequent range queries (>,<,>=,<=) as well as order by and group by can be considered
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