SQL View where rows not mapped

Question

Basically what I'm trying to figure out is, Say I have

table 1tbl1

ID | Name

and table2tbl2

ID | Name

Then I have a mapping table mt

ID | tbl1ID | tbl2ID

Data really isn't important here, and these tables are examples.

How to make a view that will grab all the items in tbl1 that aren't mapped to mt.

I'm using Microsoft SQL-server 2008 by the way.

Answer 1

CREATE VIEW v_unmapped
AS
SELECT  *
FROM    tbl1
WHERE   id NOT IN
        (
        SELECT  tbl1Id
        FROM    mt
        )