Getting result of dynamic SQL into a variable for sql-server

Question

Executing dynamic SQL as follows in Stored Procedure:

DECLARE @sqlCommand nvarchar(1000)
DECLARE @city varchar(75)
SET @city = 'London'
SET @sqlCommand = 'SELECT COUNT(*) FROM customers WHERE City = @city'
EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75)', @city = @city

How do I use the count(*) column value as return value in the SP?

score 252 · Accepted Answer · edited Dec 01 '21 at 14:32

252

DECLARE @sqlCommand NVARCHAR(1000)
DECLARE @count INT
DECLARE @city VARCHAR(75)
SET @city = 'New York'

SET @sqlCommand = 'SELECT @cnt=COUNT(*) FROM customers WHERE City = @city'
EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75), @cnt int OUTPUT', @city = @city, @cnt = @count OUTPUT

SELECT @count

edited Dec 01 '21 at 14:32

Andrew

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answered Oct 01 '10 at 15:43

Sage

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+1: You beat me to it, need to declare a variable, and mark it as an OUTPUT. [For more info, and a recommended read for SQL Server dynamic SQL, see The curse and blessings of dynamic SQL](http://www.sommarskog.se/dynamic_sql.html#sp_executesql) – OMG Ponies Oct 01 '10 at 15:46
1

Thank you. The OUTPUT keyword in N'@city nvarchar(75),@cnt int OUTPUT' was what I was missing. – Peter Lindholm Oct 01 '10 at 17:28
1

Is there no solution that doesn't require adding an output variable to the dynamic statement??? – Tab Alleman Dec 20 '16 at 16:18

score 5 · Answer 2 · answered Oct 21 '16 at 08:04

dynamic version

    ALTER PROCEDURE [dbo].[ReseedTableIdentityCol](@p_table varchar(max))-- RETURNS int
    AS
    BEGIN
        -- Declare the return variable here
       DECLARE @sqlCommand nvarchar(1000)
       DECLARE @maxVal INT
       set @sqlCommand = 'SELECT @maxVal = ISNULL(max(ID),0)+1 from '+@p_table
       EXECUTE sp_executesql @sqlCommand, N'@maxVal int OUTPUT',@maxVal=@maxVal OUTPUT
       DBCC CHECKIDENT(@p_table, RESEED, @maxVal)
    END


exec dbo.ReseedTableIdentityCol @p_table='Junk'

Brad · Answer 3 · 2010-10-01T15:48:43.303

2

You've probably tried this, but are your specifications such that you can do this?

DECLARE @city varchar(75)
DECLARE @count INT
SET @city = 'London'
SELECT @count = COUNT(*) FROM customers WHERE City = @city

edited Oct 01 '10 at 15:48

answered Oct 01 '10 at 15:41

Brad

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score 0 · Answer 4 · answered Oct 01 '10 at 15:41

0

DECLARE @sqlCommand nvarchar(1000)
DECLARE @city varchar(75)
DECLARE @cnt int
SET @city = 'London'
SET @sqlCommand = 'SELECT @cnt=COUNT(*) FROM customers WHERE City = @city'
EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75)', @city = @city
RETURN @cnt

answered Oct 01 '10 at 15:41

CristiC

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I think your answer got cut off. – Sage Oct 01 '10 at 15:44
Msg 137, `Must declare the scalar variable "@cnt".` Msg 178, `A RETURN statement with a return value cannot be used in this context.`. A nice piece of work, bro )) – it3xl Aug 19 '18 at 13:34

score -1 · Answer 5 · answered May 04 '17 at 08:37

-1

this could be a solution?

declare @step2cmd nvarchar(200)
DECLARE @rcount NUMERIC(18,0)   
set @step2cmd = 'select count(*) from uat.ap.ztscm_protocollo' --+ @nometab
EXECUTE @rcount=sp_executesql @step2cmd
select @rcount

answered May 04 '17 at 08:37

Stefano Pedone

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@rcount always give 0 as result – Roushan Feb 10 '23 at 12:41

score -2 · Answer 6 · edited Sep 28 '12 at 12:31

-2

 vMYQUERY := 'SELECT COUNT(*) FROM ALL_OBJECTS WHERE OWNER = UPPER(''MFI_IDBI2LIVE'') AND OBJECT_TYPE = ''TABLE'' 
    AND OBJECT_NAME  =''' || vTBL_CLIENT_MASTER || '''';
    PRINT_STRING(VMYQUERY);
    EXECUTE IMMEDIATE  vMYQUERY INTO VCOUNTTEMP ;

edited Sep 28 '12 at 12:31

fancyPants

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answered Sep 28 '12 at 12:07

PaOne

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This doesn't apply for sql server. – Robert Lujo May 23 '15 at 11:06

Getting result of dynamic SQL into a variable for sql-server

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