Question

I am using the exec(“query_string”) command on sql server. The matter is that the changes executed by this command cannot seen outside.

I mean that, I try to create a temp table with dynamic columns in a exec command an it runs ok, but when I try to make a select statement over created table I receive a error message that says that the table does not exists.

I know that is a context problem and my cuestion is how I make to exec command runs on a same context just like other sql statements???

CREATE TABLE #Test ( TheDate datetime, Harvest int )
INSERT INTO #Test(TheDate, Harvest) VALUES ('2011/10/11', 50)
INSERT INTO #Test(TheDate, Harvest) VALUES ('2012/10/11', 100)
INSERT INTO #Test(TheDate, Harvest) VALUES ('2011/10/01', 20)
INSERT INTO #Test(TheDate, Harvest) VALUES ('2011/12/11', 50)
INSERT INTO #Test(TheDate, Harvest) VALUES ('2011/11/11', 50)
INSERT INTO #Test(TheDate, Harvest) VALUES ('2011/11/12', 150)

DECLARE @listCol2 varchar(max)
SET @listCol2 = 
    (SELECT DISTINCT ('[' + CONVERT(varchar,YEAR(TheDate)) + '-' + RIGHT('0'+CONVERT(varchar,MONTH(TheDate)),2) +'] date,')
     FROM #Test
     ORDER BY ('[' + CONVERT(varchar,YEAR(TheDate)) + '-' + RIGHT('0'+CONVERT(varchar,MONTH(TheDate)),2) +'] date,') ASC
     FOR XML PATH(''))
SET  @listCol2 = LEFT(@listCol2,LEN(@listCol2)-1)
SELECT  @listCol2

EXEC ('CREATE TABLE #Test2 ('+@listCol2+')') 

SELECT * FROM #Test2 --In this line I got this message: the name of the object #Test2 isn't valid, why???

DROP TABLE #Test2

DROP TABLE #Test

Thanks

Answer 1

you can have following options.

EXEC ('CREATE TABLE #Test2 ('+@listCol2+'); Select * from #test2') 



EXEC ('CREATE TABLE ##Test2 ('+@listCol2+')') 

SELECT * FROM ##Test2 --it will not throws the name of the object isn't valid

DROP TABLE ##Test2


EXEC ('CREATE TABLE Test2 ('+@listCol2+')') 

SELECT * FROM Test2 --it will not throws the name of the object isn't valid

DROP TABLE Test2