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Creating Values in stored procedures

Posted on 2009-07-13
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Last Modified: 2012-05-07
I would like to create values inside stored procedures and assign them to certain variables in the stored procedure.  how would I do that?
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Question by:VBBRett
3 Comments
 
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Expert Comment

by:Aneesh Retnakaran
ID: 24843096
SELECT @Variable = 100

SELECT @Variabl2 = SomeCOlumn
FROM SomeTable
WHERE someCondition
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by:chapmandew
ID: 24845993
or with aggregations:

select @sumval = sum(somefield) from tablename

or from a function

select @value = dbo.udf_functionname()

get current date

select @date = getdate()

get current user

select @currentuser = suser_sname()
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Mark Wills earned 500 total points
ID: 25014100
The one thing missing from the above examples is the DECLARE statement to create the variable in the first place.

To set the value of the variables you can use either SET or SELECT and do have some advantages depending on how / where they are being used. For example, in the code below we could use the SELECT strategy to set a few variables from a select clause. It really depends on whether or not it is truly a scaler variable.

e.g.



Create Procedure usp_My_Procedure (@param int)

as

Begin

   declare @I int

   declare @J int

   declare @K int

   declare @C char(1)

   declare @D datetime
 

   set @I = @param

   set @J = @I * 100
 

   set @I = (select max(number) from master..spt_values where type = 'P')  

   select @K = max(number), @C = max(type) from master..spt_values where type = 'P'
 

   set @D = getdate() + @param
 

   select @param as [param], @I as [i], @J as [j], @K as [k], @C as [C], @D as [date]
 

end

GO
 

-- then to test it simply use the exec function and pass the parameter (in this case the value 4)
 

exec usp_My_Procedure 4

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