Question

Possible Duplicate:
TSQL Writing into a Temporary Table from Dynamic SQL

 ALTER PROCEDURE [dbo].[usp_ServicesStats1](@PERIOD VARCHAR(30) )

 AS
 BEGIN
-- SET NOCOUNT ON added to prevent extra result SETs FROM
-- interfering with SELECT statements.
SET NOCOUNT ON;


 DELETE FROM servicesstats1;
 DECLARE @QUERY  NVARCHAR(MAX);

 DECLARE @mainTable VARCHAR(50)

 SET @mainTable = '[ServicesStats' + @PERIOD + ']';



 SET @QUERY = 'INSERT INTO servicesstats1(Department,StudentUsers) 
 SELECT department,COUNT(*) FROM ' +  @mainTable + 
 'GROUP BY department';

 EXEC(@QUERY); -- runs okay!


 IF OBJECT_ID('tempdb..[##tmp5]') is not null 
BEGIN 
    drop table [##tmp5] 
END

 SET @QUERY = ' SELECT studentid
 INTO [##tmp5]
 FROM ' + @mainTable + '
 GROUP BY studentid
 having COUNT(*)=1; select * from [##tmp5];';
 PRINT @QUERY;


 EXEC sp_executesql @QUERY;

 IF OBJECT_ID('tempdb..[#tmp3]') is not null 
BEGIN 
    drop table [#tmp3] 
END

 SELECT S.department,COUNT(*) AS No INTO #TMP3 --  ONLY THIS SERVICE 
 FROM servicesstats_0511_0412 s, #TMP5 T    -- this is not being replaced yet by the @mainTable
 WHERE S.STUDENTID = T.STUDENTID
 GROUP BY S.department

Error :

Invalid object name ‘#TMP5’.

The problem is temporary table #tmp5, now if I were to run this it would work but it’s not dynamic.

SELECT studentid
INTO [#tmp5]
FROM tableName
GROUP BY studentid
having COUNT(*)=1;

Basically I’m doing this because of the dynamic table name. But #tmp is throwing that error.

Answer 1

You are using a local temporary table, which only exists within the scope of your dynamic sql, so you could reference it as follows without error:

SET @QUERY = ' SELECT studentid
INTO [#tmp5]
FROM ' + @mainTable + '
GROUP BY studentid
having COUNT(*)=1; 
SELECT * 
FROM [#tmp]';

EXEC sp_executesql @QUERY;

However, when you try and access it outside of the scope of your dynamic sql you can no more access it that you could from another window in SSMS. You’ll need to use a global temporary table, then you can access it:

SET @QUERY = ' SELECT studentid
INTO [##tmp5]
FROM ' + @mainTable + '
GROUP BY studentid
having COUNT(*)=1;';

EXEC sp_executesql @QUERY;

SELECT  *
FROM    [##Tmp5];

Just be aware of possible issues in a multi user environment.