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Re: Help optimizing a query
Posted by: Mike Hillyer
Date: October 25, 2004 10:50AM

Well why even use a subquery?

SELECT adresse
FROM tblcourriel, tblcontactinfo, tblcontactcontactinfo, tblinscription, tblactivite
WHERE tblcourriel.id = tblcontactinfo.reference
AND tblcontactinto.type = 2
AND tblcontactinfo.id = tblcontactcontactinfo.contactinfo
AND tblcontactcontactinfo.contact = tblinscription.participant
AND tblinscription.activite = tblactivite.id
AND tblactivite.nom like '%g05%'

That should produce the same results, you may want to check its performance.

Mike Hillyer, Technical Writer
MySQL AB, www.mysql.com
Office: +1 403-380-6535

Blog: http://www.openwin.org/mike

"The Open Source movement has become a major force across the software industry, and MySQL is the world's most popular open source database."
--Fortune Magazine

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October 22, 2004 08:56AM
Re: Help optimizing a query
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