Re: Help interpreting EXPLAIN results
It's a left join, it needs to read all left table rows.
The engine can use one table index in such a query. If you can do with the zero counts, you could try it as an inner join. You could try a covering index(regionid, productid, id, sold), playing with the order till the engine likes it.
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November 18, 2015 03:19AM
November 18, 2015 12:43PM
November 18, 2015 03:37PM
Re: Help interpreting EXPLAIN results
November 18, 2015 03:45PM
December 08, 2015 09:29PM
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