Parameter queries prompt you for the data you want to find.
Like a select query, a parameter query saves the basic structure of your query—such as which fields to be displayed.
You also specify which field or fields you want to use as criteria to narrow down your search, such as sales figures in a certain month.
What makes parameter queries unique is that you set them up to prompt you for the data you need—for example, which month you want to search for when you run the query.
You don't have to enter the actual values (such as which month you want sales figures for) when you set up the query. That means you're in control when you run the query, and can specify any month you want.
Without a parameter query, you'd wind up with a select query for every month you might want to search for, which isn't very efficient.
