[Home](./index.md) > [@firebase/database](./database.md) > [orderByKey](./database.orderbykey.md) ## orderByKey() function Creates a new `QueryConstraint` that orders by the key. Sorts the results of a query by their (ascending) key values. You can read more about `orderByKey()` in [Sort data](https://firebase.google.com/docs/database/web/lists-of-data#sort_data). Signature: ```typescript export declare function orderByKey(): QueryConstraint; ``` Returns: [QueryConstraint](./database.queryconstraint.md)