distinct count using lookup table
How can I get a distinct count of column values using a different table?
Let's say I want to get a distinct count of all "company_name" records in table "emp" that corespond (match) with "lookup" table, "state" category.
What I want is to find counts for all companies that have a value of "california" in the "state" column of the "lookup" Table. I want the output to look like:
Sears 17
Pennys 22
Marshalls 6
Macys 9
I want the result to show me the company names dynamically as I don't know what they are, just that they are part of the "state" group in the lookup Table. Does this make sense?
M