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Re: slow query sorting result - sending data
Posted by: Peter Brawley
Date: April 28, 2015 10:38PM

Table structure shows no sign of having been normalised; it looks more suitable for a nosql database, or perhaps a spreadsheet.

Queries with many OR clauses optimise poorly, esp. in MySQL 5.0.

The profiler isn't very useful for optimising queries.

5.0 is obsolete; if you really need relational logic, upgrade to 5.6, which offers much better query optimisation, and examine what stands in the way of normalising the table.

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Re: slow query sorting result - sending data
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April 28, 2015 10:38PM


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