# WhereCallback

# Type Alias: WhereCallback()\<TContext\>

```ts
type WhereCallback<TContext> = (refs) => any;
```

Defined in: [packages/db/src/query/builder/types.ts:129](https://github.com/TanStack/db/blob/main/packages/db/src/query/builder/types.ts#L129)

WhereCallback - Type for where/having clause callback functions

These callbacks receive a `refs` object containing RefProxy instances for
all available tables. The callback should return a boolean expression
that will be used to filter query results.

Example: `(refs) => eq(refs.users.age, 25)`

## Type Parameters

### TContext

`TContext` *extends* [`Context`](../interfaces/Context.md)

## Parameters

### refs

[`RefsForContext`](RefsForContext.md)\<`TContext`\>

## Returns

`any`