# PER_ROW_CALCULATED_COLUMN_TYPES

Canonical page: https://www.adaptabletools.com/docs/reference/per_row_calculated_column_types

The per-row Calculated Column types: `Standard` and `Observable` evaluate
against a single row (the latter reading that row's change history); every
other type aggregates over rows.

```ts title="TypeScript"
PER_ROW_CALCULATED_COLUMN_TYPES: readonly CalculatedColumnType[]
```