| Accum | Accumulates values of a column. |
| Avg | Calculates average (mean) value of a column. |
| Base | Base class for "value" functions, i.e. |
| Concat | Accumulates values of a column. |
| Count | Calculates average (mean) value of a column. |
| First | Accumulates only a first value of a column. |
| Max | Calculates max value of a column. |
| Median | Calculates median of a column. |
| Min | Calculates min value of a column. |
| Mode | Calculates mode of a column. |
| Sum | Calculates sum of a column. |