Select the departments with a budget larger than the average budget of all the departments.
| SELECT code, name, budget FROM departments
| COPY
| GROUP budget AVG
| CROSS
| WHERE budget $> budget-avg
1 row 0 msec
| COPY
| GROUP budget AVG
| CROSS
| WHERE budget $> budget-avg
1 row 0 msec
| budget-avg | code | name | budget | 
|---|---|---|---|
| 93750 | 59 | Human Resources | 240000 | 
The $ modifier allows to compare with another column in the tuple and not a constant. The right side can also be an expression in RPN form.