G. J. Walsh wrote:
> 1 of the 4 tables has the complete range of keys, in this case about
> 1,000. The other 3 tables have data representing most but not all of
> those keys, and in different sets. I want to end up with a new
> 'combined' table which will allow me to immediately 'see' missing data
> from the 3 smaller tables and take the necessary steps to 'fill in the
> blanks'. I realize I would of course have to create that table without
> constrictions other than the primary key.
Do you mean you want to find keys that exist in the 'main' table but
have no match in the other three tables?
--
Cliff Nieuwenhuis