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Re: Join by date range unacceptably slow
Posted by: Peter Brawley
Date: May 15, 2017 05:55PM

MySQL version?

Run Explain on the query, then have a look at https://dev.mysql.com/doc/refman/5.7/en/range-optimization.html to see of you can find an index configuration that helps.

If you can't, or if you have an older version, you may have to accumulate the counts in a temp table, then do the updates from that.

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Re: Join by date range unacceptably slow
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May 15, 2017 05:55PM


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