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Re: Left join optimization- query is very slow
Posted by: Øystein Grøvlen
Date: March 05, 2015 09:12AM

Hi Devrishi,

Your problem is that you are not using the same character set for the imei columns of the two tables (One is uft8, other is latin1). Hence, MySQL can not use index to execute join.

Regards,

Øystein Grøvlen,
Senior Principal Software Engineer,
MySQL Group, Oracle,
Trondheim, Norway

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