How To Create View Of Union On Variant Tables ?

HI, Guys:

I've some AT_DATE tables (eg: AT_20080401, AT_20080402, ...) in SQLServer DB, and these AT_XX table have same columns. but table count could be variant, so I have to query sysobjects to get all of these tables. like this:
select name from sysobject where name like 'AT_%'

Now I try to create a view AT which is the union of all these AT_XX tables, such as:




Code Snippet

Create View AT as
select * from AT_20080401
union
select * from AT_20080402
union ...

but since I'm not sure how many tables there, it would be impossible to write SQL as above.
though I could get this union result via stored-procedure, view couldn't be created on the resultset of a procedure.
Create View AT as
select * from AT_createView() <-- AT_createView must be a function, not procedure

I've checked msdn, there is Multi-statement table-valued function, but this function type seems to create one temporary table, I don't want to involve much of insert operation because there could be more than 1million records totally in these AT_XX tables.

So is there any way to achived my goal?
any reference would be appreciated, thanks !