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Re: Slow Query, Optimization Advice Needed
Posted by: Peter Brawley ()
Date: April 27, 2016 11:28PM

In(Select...) can be a performance killer, especially before MySQL 5.6. Yours just selects an M row with locationid matching L and a trailerid with the highest tbmovements value. That can be done with a join.

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Subject Views Written By Posted
Slow Query, Optimization Advice Needed 762 Michael Lawson 04/26/2016 09:30AM
Re: Slow Query, Optimization Advice Needed 376 Øystein Grøvlen 04/27/2016 01:02AM
Re: Slow Query, Optimization Advice Needed 462 Michael Lawson 04/27/2016 07:20PM
Re: Slow Query, Optimization Advice Needed 378 Peter Brawley 04/27/2016 11:28PM
Re: Slow Query, Optimization Advice Needed 358 Øystein Grøvlen 04/28/2016 01:25AM
Re: Slow Query, Optimization Advice Needed 362 Rick James 05/01/2016 11:47PM
Re: Slow Query, Optimization Advice Needed 375 Øystein Grøvlen 05/02/2016 01:28AM
Re: Slow Query, Optimization Advice Needed 367 Øystein Grøvlen 04/28/2016 01:12AM


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