Execute Statement..

Dear Friens,
I am writing a SP.But storeing a query in a variable.But at the time
of execution generating error.Exam
===================
Declare @.query varchar{500)
Set @.query = 'Select * from table'

if exists (exec (@.query))
print 'Hi'
====================
But "if exists" line giving error.How do I solve this.Please help me
out.
Reagrds
Arijit ChatterjeeHi

EXISTS requires a sub-query as the test, and EXEC does not do that.

If you have to do this dynamically then you may want to look at
sp_executesql to return a count or move everything into @.query.

If you posted more precise detail it may be easier to offer advice.

John

arijitchatterjee123@.yahoo.co.in (Arijit Chatterjee) wrote in message news:<ea01504d.0310302205.2ca98658@.posting.google.com>...
> Dear Friens,
> I am writing a SP.But storeing a query in a variable.But at the time
> of execution generating error.Exam
> ===================
> Declare @.query varchar{500)
> Set @.query = 'Select * from table'
> if exists (exec (@.query))
> print 'Hi'
> ====================
> But "if exists" line giving error.How do I solve this.Please help me
> out.
> Reagrds
> Arijit Chatterjee|||Create proc sp_test
as
Declare @.query varchar{500)
Declare @.var varchar(10)
set @.var='Test'
Set @.query = 'Select * from table' + ' Where ' + 'Colname = ' + @.var
exec (@.query)--> Working fine
if exists (exec (@.query))--> Sending error
print 'Hi'
Now tell me how to solve this.
Regards
Arijit Chatterjee|||See inline

"Arijit Chatterjee" <arijitchatterjee123@.yahoo.co.in> wrote in message
news:ea01504d.0311012028.19b506fb@.posting.google.c om...
> Create proc sp_test
> as
> Declare @.query varchar{500)
This will not compile

> Declare @.var varchar(10)
> set @.var='Test'
> Set @.query = 'Select * from table' + ' Where ' + 'Colname = ' + @.var
If you were doing this correctly the value in @.var would be enquoted

> exec (@.query)--> Working fine
> if exists (exec (@.query))--> Sending error
> print 'Hi'
> Now tell me how to solve this.

Reading books online would be the first place to look.

Then read http://www.algonet.se/~sommar/dynamic_sql.html on why you should
justify the use of dynamic SQL.

You should then be able to work out how to return the count using
sp_executesql to get what is require.

> Regards
> Arijit Chatterjee

John|||What you need to do in this case is create a sql server temporary
table (such as create table #temp (column1 nvarchar(10),column2
nvarchar(10))) and then build your @.query string so that it inserts
the results of your dynamic select statement into the temp table. You
can then play the whole "exists" game on the results of a query
against your #temp table.

Make sure that you do not build your temp table dynamically. And
remember, you can't insert results from a dynamically built select
statement into a normal variable, but you can insert them into a temp
table.

Good Luck!

"John Bell" <jbellnewsposts@.hotmail.com> wrote in message news:<bo2oar$89l$1@.hercules.btinternet.com>...
> See inline
> "Arijit Chatterjee" <arijitchatterjee123@.yahoo.co.in> wrote in message
> news:ea01504d.0311012028.19b506fb@.posting.google.c om...
> > Create proc sp_test
> > as
> > Declare @.query varchar{500)
> This will not compile
> > Declare @.var varchar(10)
> > set @.var='Test'
> > Set @.query = 'Select * from table' + ' Where ' + 'Colname = ' + @.var
> If you were doing this correctly the value in @.var would be enquoted
> > exec (@.query)--> Working fine
> > if exists (exec (@.query))--> Sending error
> > print 'Hi'
> > Now tell me how to solve this.
> Reading books online would be the first place to look.
> Then read http://www.algonet.se/~sommar/dynamic_sql.html on why you should
> justify the use of dynamic SQL.
> You should then be able to work out how to return the count using
> sp_executesql to get what is require.
> > Regards
> > Arijit Chatterjee
> John