You can't (well you shouldn't ) link the two tables on "Sites". If "DEF @ Maryland" is in one table but not in the other table, "DEF @ Maryland" will not be in the recordset (the query).
You can select all records from one table (Location) and only the matching records from the other table (PC Inventory), but if you want to see a record from either table, you have two options:
1) Fix the table structure
2) Use a union query. You must type the union query - query wizard can't create it.
The union query would look like:
Code:
SELECT sites From Location
Union
SELECT sites From [PC Inventory]
You should read up on the syntax for union queries. This is off the top of my head - I don't remember exactly what the syntax is.