3 Database

MySQL

• MySQL is an open-source relational database management system.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.

CHARACTERISTICS

• MySQL was created by a Swedish company, MySQL AB, founded by David Axmark, Allan Larsson and Michael "Monty" Widenius.
• The first version of MySQL appeared on 23 May 1995.

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Link

• https://en.wikipedia.org/wiki/MySQL

Oracle

• Oracle Database is an object-relational database management system[3] produced and marketed by Oracle CorporationAn Oracle database system—identified by an alphanumeric system identifier or SID[5 comprises at least one instance of the application, along with data storage.

Caracteristics

• Undo files: These special datafiles, which can only contain undo information, aid in recovery, rollbacks, and read-consistency.
• The library cache[21 stores shared SQL, caching the parse tree and the execution plan for every unique SQL statement.

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Link

• https://en.wikipedia.org/wiki/Oracle_Database

SQL Server

• Microsoft SQL Server is a relational database management system developed by Microsoft. As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network (including the Internet).

Caracteristics

• Compatibility with most administrative tasks for SQL Server.
• An integrated management engine database SQL Server and creating unique environment.

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Link

• https://en.wikipedia.org/wiki/Microsoft_SQL_Server