# count

# Function: count()

```ts
function count(arg): Aggregate<number>;
```

Defined in: [packages/db/src/query/builder/functions.ts:366](https://github.com/TanStack/db/blob/main/packages/db/src/query/builder/functions.ts#L366)

## Parameters

### arg

`ExpressionLike`

## Returns

[`Aggregate`](../@tanstack/namespaces/IR/classes/Aggregate.md)\<`number`\>