# aggregationFn_count

# Variable: aggregationFn\_count

```ts
const aggregationFn_count: AggregationFn<any, any>;
```

Defined in: [fns/aggregationFns.ts:198](https://github.com/TanStack/table/blob/main/packages/table-core/src/fns/aggregationFns.ts#L198)

Aggregation function for counting the number of rows in a column.