You can create parameters that require
users to enter a single (discrete) value, or a range of values. If you then
include these parameters in your report's record selection, you can help users
find specific information. For example, in the case of a record selection
parameter than uses a discrete value, a user might enter a single country name
to see sales figures for only that country. In the case of a record selection
parameter that uses a range of values, a user might enter a range of countries
(for example, Canada and France) to see sales figures for all the countries in
the range (in this case, Chili, China, Denmark, England, and so on).