Hi @VoltesDev
Thanks for reaching out to the Microsoft Fabric Community Forum.
The Delta table format does not enforce a strict "primary key" concept, but often, keys are defined as part of the business logic or during table design.
1.Delta Lake does not natively enforce primary key constraints. However, primary keys might be defined implicitly by:
- The data engineering team who created the Delta table.
- Application or business logic, which assumes certain fields are unique.
The primary key information may not always be explicitly available in metadata or table schema.
2.Metadata Exploration:
1.Use DESCRIBE DETAIL to examine the table schema. This provides metadata about the table, including format (should be Delta),schema String, which shows the full schema of the table, including columns and their data types.
You can further inspect the schema to infer the key by looking at fields likely to be unique, such as IDs or composite fields.
2.Use SHOW TBLPROPERTIES to check for custom metadata or constraints.
3. Infer Keys via Queries. Run SQL queries to identify unique columns or combinations of columns
4.Consult the team or documentation responsible for the Delta table's design, as primary keys are often defined externally.
These steps help to understand or infer the primary key logic in Delta tables for analysis or integration.
If you have any further questions or need additional help with this, feel free to reach out to us for further assistance!
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