Combines a data lake with database-style access: Delta tables, files and folders sit in OneLake, and the SQL and Spark engines can both query them. It is one of the item types in Fabric.
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Terms in this definition
- Data lake
Holds files of every kind, structured, semi-structured or unstructured, usually spread over a distributed file system, and lets engines like Spark apply a schema when reading. In Azure this is Data Lake Storage: Blob Storage with a hierarchical namespace enabled.
- OneLake
Built on Azure Data Lake Storage Gen2, it is the one logical data lake for an entire Microsoft Fabric tenant, provisioned automatically, and the place where every Fabric workload keeps its data.
- Serverless
Compute tier for single Azure SQL databases that scales automatically, pauses when idle and charges by the second. It is offered in General Purpose and Hyperscale, not Business Critical, and reserved capacity does not apply.
Related terms
- Data lakehouse
Combines a lake and a warehouse: raw data stays as files, yet Delta Lake lets you query it as SQL tables. Fabric Lakehouse and the lakehouse in Databricks work this way.
- Fabric API for GraphQL
Generates a single GraphQL endpoint, with its schema and resolvers, over data in Fabric warehouses, SQL databases in Fabric, lakehouse SQL analytics endpoints, mirrored databases or Azure SQL Database, supporting both reads (queries) and writes (mutations).