Search relation search between one or many fields can be very powerful.
A search string could for example be:
1. A > 10
All values in field A with values larger than 10 will be selected.
2. A > 10 and B < 2
All values in field A with values larger than 10 and were values from field B is smaller than 2 will be selected.
3. A > B
Only values were A is larger than B will be selected
| < | Smaller then |
| > | Larger then |
| = | Equals |