How to set up a governed JDBC connection in Unity Catalog

Walks through Databricks' new Unity Catalog JDBC connection type (Public Preview on Databricks Runtime 18.1 and DBSQL 2025.40 and above): staging the driver JAR in a Unity Catalog volume, creating the connection as a securable object, and granting access with GRANT USE CONNECTION so callers never see the URL or credentials. Compares it against query federation and PySpark data sources so a reader can pick the right one for a given external source.

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