# init(predicates:sortDescriptors:limit:) Creates a sample query descriptor. ``` init(predicates: [HKSamplePredicate], sortDescriptors: [SortDescriptor], limit: Int? = nil) ``` ## Parameters `predicates` An array of sample predicates that define the type of data that the query returns. To query for multiple types of data, provide a sample predicate for each type. `sortDescriptors` An array of sort descriptors that specify the order of the results that the query returns. If you don’t need the results in a specific order, pass an empty array. `limit` An optional value that specifies the maximum number of samples that the query returns. If you don’t specify the limit, the system returns all matching samples in the HealthKit store. ## Discussion The system sets the descriptor’s `Output` type based on the `predicates` parameter. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)