T-SQL Dynamic SQL and Temp Tables

Question

It looks like #temptables created using dynamic SQL via the EXECUTE string method have a different scope and can\'t be referenced by \"fixed\" SQLs in the same stored proced

Answer 1

1st Method - Enclose multiple statements in the same Dynamic SQL Call:

DECLARE @DynamicQuery NVARCHAR(MAX)

SET @DynamicQuery = 'Select * into #temp from (select * from tablename) alias 
select * from #temp
drop table #temp'

EXEC sp_executesql @DynamicQuery

2nd Method - Use Global Temp Table:
(Careful, you need to take extra care of global variable.)

IF OBJECT_ID('tempdb..##temp2') IS NULL
BEGIN
    EXEC (
            'create table ##temp2 (id int)
             insert ##temp2 values(1)'
            )

    SELECT *
    FROM ##temp2
END

Don't forget to delete ##temp2 object manually once your done with it:

IF (OBJECT_ID('tempdb..##temp2') IS NOT NULL)
BEGIN
     DROP Table ##temp2
END

Note: Don't use this method 2 if you don't know the full structure on database.