--주의!!, 임시테이블명 끝에 '_'가 붙으면 안된다.
select 1 as a into #dsfajflsdaf

select left(name, charindex('______',name)-1) 
from tempdb..sysobjects
where charindex('______',name) > 0
and xtype='u'
and not object_id('tempdb..'+ name) is null