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Right-click on the
Country combo box
and select
Properties.
When the Combo Box:
Country dialog box appears, click the
Data
tab to see the contents.

Notice the entry in the
Row Source field. The query written there is written in
Structured Query Language, or SQL. Despite being a type of
computer ‘language,’ it is quite intuitive and easy to read.
This query does exactly like it reads: selects the distinct
countries from the table of customers, therefore putting each
country Northwind has sold to as entries in the combo box.
Though Access takes care of the SQL for us, we will explore SQL
a bit more in this manual. |