Glossary · Database

Multi-Database Querying

Multi-database querying is the ability to connect to and query several different databases–often different engines entirely–from a single tool or interface.

Real companies rarely have one database. Production runs on Postgres, an old service still uses MySQL, product events sit in MongoDB, and the new project is on Supabase. Multi-database querying means one interface speaks to all of them, translating questions into each engine's dialect, instead of forcing you to juggle four clients with four credential sets. The value is consolidation: one place to ask questions, one mental model, one access policy–regardless of where the data physically lives.

Fig — every answer ships with the tables, rows and SQL behind it.