Query key
A query key is a structured array identifier that uniquely describes a data query and its parameters for caching and lookup.
React Hooks in Action: With Suspense and Concurrent Mode
A query key is a structured identifier that uniquely describes a React Query data query for caching and lookup.
- How it is used
- Coordinates React Query caching, lookup, request deduplication, and responsive background refetching.
- How deep it goes
- Defines string, array, and serializable object keys, then applies them to cache access without detailing cache staleness rules.
- Examples
- Uses shared bookables data, parameterized bookings, and cached bookable details in an edit form.
- What you can do after
- Builds React Query calls with shared or parameterized keys and retrieves matching data from the query cache.
Read how React Hooks in Action: With Suspense and Concurrent Mode explains query key →
React in Depth
A query key is an array of values that uniquely identifies a TanStack Query query and its parameters.
- How it is used
- Identifies cached queries and enables exact or partial invalidation after remote-data changes.
- How deep it goes
- Explains key composition and invalidation behavior, but stops short of cache hashing or serialization internals.
- Examples
- Illustrates customer lists, individual customers, pagination, name searches, and deletion-triggered invalidation.
- What you can do after
- Apply it via TanStack Query to separate parameterized server data and invalidate related cache entries selectively.
Related concepts
- SQLconfigures · SQL is a standardized declarative language for defining, querying, and manipulating data and structures in relational database systems.
- useQueryused by · useQuery is a TanStack Query hook for asynchronously fetching and caching data while exposing its data, status, and error state.
- cachinguses · Caching is the practice of storing reusable data or computation results so later access can avoid repeating retrieval or computation.
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