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MySQL »   Do you always need index on WHERE column ?

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    • CommentAuthorxylogue
    • CommentTimeApr 29th 2008
     
    I believe we wrote about this before, but this topic popups again and again.
    Today I've read opinion that if we have clause WHERE has_something=1 we should have index on column `has_something` . . .
    http://www.mysqlperformanceblog.com/2007/08/28/do-you-always-need-index-on-where-column/

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