Go to the database window - query tab and click on New. Select Design View
and click OK. In the Show Table dialog, click Close. Click the SQL button at
the far left of the toolbar at the top of the screen. You will be in SQL
view where you can type in the union query:
Select .......
Union
Select .....;
Esentially you have two SQL strings joined by the word Union. No semicolon
at the end of the first SQL string.