On 03/07/2013 10:27 AM, Harald Leithner wrote:
> oh and
>
>> Does that provide the same information as the UNION
>
> Yes it provides the same information but it could happend that it
> doesnot return 3 rows, for example if you have not revent_flag messages
> it doesn't return the count 0 so you have to preset the variable for 0
> vaules.
I still don't understand. Can you provide some query output as an example?
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