Question

By trying this

use master
go

select * into #TempTable from sys.all_views 
select * from #TempTable
drop table #TempTable

exec('
select * into #TempTable2 from sys.all_views 
')
/* This will give error: */
select * from #TempTable2

I realized that #TempTable2 is not accessible… so using the select into #TempTable syntax is used inside an EXEC statement means the table is auto destroyed as the exec statement is completed?

Answer 1

Yes.

You can see this with

exec('
select * into #TempTable2 from sys.all_views 
select * from tempdb.sys.tables
')
select * from tempdb.sys.tables

You can use a ##global temporary table if you want to be able to access it later. e.g.

use master
go
declare @temptablename char(40)

set @temptablename = '[##' + cast(newid() as char(36)) + ']'

exec('
select * into ' + @temptablename + ' from sys.all_views 
')
/* Do some other stuff: */

exec('
select * from ' + @temptablename)