Help Whit Query

Question

Help Whit Query

EIAnd

Right there with Babe

Points: 743
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December 16, 2008 at 7:09 am

#197400

Hi,
i have the followin query in a store procedure:
select d.Dependencia, count(*) as TitulosAdquisicion
from Dependencias D, EjemplaresSolicitados ES, Titulos T
where ES.IDTitulo = T.IDTitulo
and T.IDDependencia = D.IDDependencia
and D.Dependencia = @Dependencia
and ES.FechaRecepcion between @FechaIni and @FechaFin
group by d.Dependencia
having count(*)>=0
is in a store procedure and recibes the parameters @Dependencia, @FechaIni , @FechaFin
I need to know if i need to show all the "Dependencias" and not filter whit this parameter but i cant modify the query, which value can i put in the parameter @Dependencia for this purpose?
thank you very much any help and Merry christmas for every body!

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ps. One Orange Chip Points: 29255 More actions · Answer 1

I need to know if i need to show all the "Dependencias" and not filter whit this parameter but i cant modify the query, which value can i put in the parameter @Dependencia for this purpose?

just remove the line and D.Dependencia = @Dependencia

and u're done..

you should also remove the Dependencia parameter from the SP(as it will no longer be required after modification).

Pradeep Singh

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 2

You need to have a key value of @Dependencia which means 'All', then use this:

select d.Dependencia, count(*) as TitulosAdquisicion

from Dependencias D, EjemplaresSolicitados ES, Titulos T

where ES.IDTitulo = T.IDTitulo

and T.IDDependencia = D.IDDependencia

and D.Dependencia = CASE @Dependencia WHEN 'All' THEN D.Dependencia ELSE @Dependencia END

and ES.FechaRecepcion between @FechaIni and @FechaFin

group by d.Dependencia

having count(*)>=0

You could use and D.Dependencia = ISNULL(@Dependencia, D.Dependencia)if @Dependencia is set to NULL for all.

Proper join syntax is recommended:

select d.Dependencia, count(*) as TitulosAdquisicion

from Dependencias D

INNER JOIN Titulos T ON T.IDDependencia = D.IDDependencia

INNER JOIN EjemplaresSolicitados ES ON ES.IDTitulo = T.IDTitulo

where D.Dependencia = CASE @Dependencia WHEN 'All' THEN D.Dependencia ELSE @Dependencia END

and ES.FechaRecepcion between @FechaIni and @FechaFin

group by d.Dependencia

--having count(*)>=0

HAVING is a filter of the output from the aggregate: in this case, having count(*)>=0 doesn't do anything.

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

EIAnd Right there with Babe Points: 743 More actions · Answer 3

EIAnd

Right there with Babe

Points: 743

December 16, 2008 at 8:39 am

#913205

thank you all, it works perfectly!!