Subject Re: [firebird-support] FireBird SQL help
Author Wei Yu
Not good since the yourtable is the stored procedure, which means that it can be called twice, causing the query be executed much much slow.

William

Magnus Titho <magnus.titho@...> wrote: william_yuwei wrote:

> I've built a stored procedure which returned the following result:
>
> ModelNo Color Size ColA ColB ColC
> 8080 Gold 48 2.5 2.2 2.4
> 8080 Gold 50 3.4 3.7 3.2
> 8080 Gun 48 0.8 0.9 0.9
>
> 8081 Blue 47 1.9 2.0 1.9
> 8081 Blue 49 2.7 3.0 2.8
>
> However there is another critera needs to be used against above
>results: if any of ColA, ColB or ColC are lower than 1.0, the whole
>group of model will be returned otherwise not, which means that Model
>8081 should not be returned to the final result, while whole records
>of Model 8080 should be returned.
>
>How can I implement this by SQL?
>
>
Maybe with something like this:

select t1.*
from yourtable t1
where exists(select t2.* from yourtable t2 where (t2.ModelNo =
t1.ModelNo) and ((t2.ColA < 1) or (t2.ColB < 1) or (t2.ColC < 1)))

"yourtable" is either the table with your original data or the stored
procedure itself.


--
Magnus



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William, Yu


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