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Re: mysql query return null value for unknown reason
Posted by: Rick James
Date: July 03, 2011 07:10PM

Some step in the expression created something that was in a datatype that did not work for the next step.

For example, SUM() expects numeric values, and probably croaks on TIME values.

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mysql query return null value for unknown reason
Alan Van Der Ploeg
July 02, 2011 08:03AM
Re: mysql query return null value for unknown reason
Rick James
July 03, 2011 01:03PM
Re: mysql query return null value for unknown reason
Alan Van Der Ploeg
July 03, 2011 01:18PM
Re: mysql query return null value for unknown reason
Rick James
July 03, 2011 07:10PM


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