All the previous queries work with defined or partially defined values, but it's very common in real world application to work for a range of values. The most common standard scenarios are:
- Filtering by numeric value range (that is, price, size, and age)
- Filtering by date (that is, events of 03/07/12 can be a range query from 03/07/12 00:00:00 to 03/07/12 24:59:59)
- Filtering by term range (that is, from A to D).