Executing a Variable in a Stored Procedure containing an Update Statement

Question

Hi,
I have created a Stored Procedure, it has one input parameter. Inside the Stored Procedure there are 5 other variables are declared, based on the input parameter 4 of these variables are populated.
Fifth variable is a a concatenation of text and some of these variables and creates a dynamic Update Statement. Once it is created I want to execute this variable but it is not executing.
Could someone please help me in knowing how to execute a variable within a stored procedure that contains an update statement.
Thanks for your help.
Thanks
Vineesh
vineesh1701

Answer 1

If you have set up the variable so that it contains a valid sql update, it should work.  For example, see below, which does do an update
use tempdb
go
Create Table #Test(i int);
Insert #Test(i) Values(1);
go
Create Procedure TestProc As
Begin
Declare @SQL nvarchar(250);
Set @SQL = 'Update #Test Set i = 2';
--Print @SQL;
Exec sp_executesql @SQL;
End
go
Exec TestProc
-- Test Result
Select * From #Test;
go
Drop Procedure TestProc;
go
Drop Table #Test;
One thing I would recommend while testing is that you print out or select the variable that contains the dynamic sql.  (Like the above code where I have a print statement.  That lets you see exactly what you are executing and if there is any problem
with the update command. 
As Naomi said, to get anything more than general help, you will probably have to show us your code and the parameter values you are passing when you execute the stored proc.
Tom