# BuiltInAggregationFn

# Type Alias: BuiltInAggregationFn

```ts
type BuiltInAggregationFn = keyof typeof aggregationFns;
```

Defined in: [features/aggregation/aggregationFns.ts:336](https://github.com/TanStack/table/blob/main/packages/table-core/src/features/aggregation/aggregationFns.ts#L336)