[Home](./index.md) > [@firebase/database](./database.md) > [endBefore](./database.endbefore.md) ## endBefore() function Creates a `QueryConstraint` with the specified ending point (exclusive). Using `startAt()`, `startAfter()`, `endBefore()`, `endAt()` and `equalTo()` allows you to choose arbitrary starting and ending points for your queries. The ending point is exclusive. If only a value is provided, children with a value less than the specified value will be included in the query. If a key is specified, then children must have a value lesss than or equal to the specified value and a a key name less than the specified key. Signature: ```typescript export declare function endBefore(value: number | string | boolean | null, key?: string): QueryConstraint; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | value | number \| string \| boolean \| null | The value to end before. The argument type depends on which orderBy*() function was used in this query. Specify a value that matches the orderBy*() type. When used in combination with orderByKey(), the value must be a string. | | key | string | The child key to end before, among the children with the previously specified priority. This argument is only allowed if ordering by child, value, or priority. | Returns: [QueryConstraint](./database.queryconstraint.md)