Ranges are designed to handle a spectrum of values. Range types are available for all the simple types except for Boolean. That is: Number Range, Currency Range, String Range, Date Range, Time Range and DateTime Range. You can generate ranges using the To, _To, To_, _To_, UpTo, UpTo_, UpFrom, and UpFrom_ keywords. In general, To is used for ranges with two endpoints, and UpTo and UpFrom are used for open ended ranges (only one endpoint). The underscores are used to indicate whether or not the endpoints are in the range.
Examples of Number Range values
The range of numbers from 2 to 5 including both 2 and 5:
2 To 5
The range of numbers from 2 to 5, not including 2 but including 5:
2 _To 5
All numbers less than or equal to 5:
UpTo 5
All number less than 5:
UpTo_ 5
Examples of DateTime Range values:
#Jan 5, 1999# To #Dec 12, 2000#
UpFrom #Jan 1, 2000#