Six free/open source databases with commercial-quality features

Microsoft, Oracle offer impressive free versions of their commercial offerings, but MariaDB wins our test
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We tested six popular free or open source relational database management systems (RDBMS): Microsoft SQL Server Express, PostgreSQL, Oracle’s MySQL, MariaDB, Apache Derby, and Firebird SQL. We tested each product on ease of installation, documentation, features, management tools and performance using a log file containing more than 1 million records. Here are the individual results. (See the story version.)

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