voluptasmollitia/docs-exp/database.queryconstrainttype.md

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[Home](./index.md) &gt; [@firebase/database](./database.md) &gt; [QueryConstraintType](./database.queryconstrainttype.md)

## QueryConstraintType type

Describes the different query constraints available in this SDK.

<b>Signature:</b>

```typescript
export declare type QueryConstraintType = 'endAt' | 'endBefore' | 'startAt' | 'startAfter' | 'limitToFirst' | 'limitToLast' | 'orderByChild' | 'orderByKey' | 'orderByPriority' | 'orderByValue' | 'equalTo';
```