SQL - Stored Procedure or Function inside a SELECT

Posted on 2007-08-01
Medium Priority
Last Modified: 2008-01-09

Is it possable to run a SQL Stored Procedure or a Function inside a SELECT statement?

If so, can you please give me an example? :)

Thank you!
Question by:Endelm
LVL 75

Accepted Solution

Aneesh Retnakaran earned 2000 total points
ID: 19610130
u can call functions inside a select statement

create function dbo.RetSum(@i int, @j int)
returns int
return (@i+@j)

SELECT dbo.RetSum(1,2)
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 19610358
>Is it possable to run a SQL Stored Procedure inside a SELECT statement?

>Is it possable to run a SQL Stored Function inside a SELECT statement?
yes, see comment of aneeshattingal
LVL 70

Expert Comment

by:Scott Pletcher
ID: 19611639
You can use a scalar function in place of any single value in a SELECT, so it can appear in the SELECT list, WHERE clause, etc..

You can use table-based functions in place of a table within a SELECT ** but the parameters to the table-based functions must be fully known at the start of the query, that is, you cannot use a result column of a query in a table-based function w/i a query**.  For example, this is OK:
SET @date = GETDATE() - 30
FROM dbo.aTableBasedFunction (@date)
since @date is known when the SELECT is started.  This is NOT allowed:
FROM table1
CROSS JOIN dbo.aTableBasedFunction (table1.column1)
since "table1.column1" varies during the query, it cannot be resolved *prior* to running the SELECT, as required.
LVL 70

Expert Comment

by:Scott Pletcher
ID: 19611652
For scalar functions, otoh, you can use table columns.  For example, this:

SELECT dbo.aScalarFunction(table1.column1) AS [Single-Value Function Result]
FROM table1
WHERE dbo.anotherScalarFunction(table1.column2) = 'ABC'

is OK.

Author Comment

ID: 19616275
Thank you.

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