[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [QueryConstraintType](./firestore_lite.queryconstrainttype.md) ## QueryConstraintType type Describes the different query constraints available in this SDK. Signature: ```typescript export declare type QueryConstraintType = 'where' | 'orderBy' | 'limit' | 'limitToLast' | 'startAt' | 'startAfter' | 'endAt' | 'endBefore'; ```