MySQL

PostgreSQL

postgres/postgres

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Extensible open-source relational database; the most used and most admired database among developers.

SQLite

sqlite/sqlite

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Serverless, zero-config embedded SQL database in a single file; the most deployed database engine.

Microsoft SQL Server

microsoft.com

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Microsoft's enterprise relational database, standard in .NET and Windows shops; also Azure SQL.

Oracle Database

oracle.com

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Long-dominant commercial enterprise RDBMS, still #1 by DB-Engines score in large organizations.

MariaDB

MariaDB/server

Community-developed MySQL fork with extra storage engines, kept compatible for drop-in replacement.