When trying to use two primary keys in a table, when I save I get an error
message that says "index and primary key cannot contain null value." What do
I need to change to be able to save this table with two primary keys?
First off, a table can have only ONE primary key. It can consist of two (or
for that matter, ten) fields - but it's one Primary Key.
The error message means exactly what it says: a primary key cannot contain a
NULL value. Somewhere in your table, the field that you're trying to include
in your primary key is empty in some record or records. You must fill every
single record with data in both fields which will comprise the primary key.
You can run a query with a criterion
IS NULL
on the field to identify the problem records.
John W. Vinson [MVP]
