MySQL (officially pronounced as is an open-source relational database management system (RDBMS).[7] Its name is a combination of "My", the name of co-founder Michael Widenius' daughter,[8] and "SQL", the abbreviation for Structured Query Language. The MySQL development project has made its source code available under the terms of the GNU General Public License, as well as under a variety of proprietary agreements. MySQL was owned and sponsored by a single for-profit firm, the Swedish company MySQL AB, now owned by Oracle Corporation.[9] For proprietary use, several paid editions are available, and offer additional functionality.

Welcome to the MongoDB 3.4 Manual! MongoDB is an open-source, document database designed for ease of development and scaling. The Manual introduces key concepts in MongoDB, presents the query language, and provides operational and administrative considerations and procedures as well as a comprehensive reference section. [1]