Sort an index Mysql

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For sorting an index and data according to an index, use

myisamchk --sort-index --sort-records=1
(assuming that you want to sort on index 1).

This is the best way to make queries faster if you have a unique index from which you want to read all rows in order according to the index.

However, the first time you sort a large table this way, it may take a long time.

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