he Oracle Database (commonly referred to as Oracle RDBMS or simply as Oracle) is an object-relational database management system(ORDBMS) produced and marketed by Oracle Corporation. The Oracle RDBMS stores data logically in the form of tablespaces and physically in the form of data files (“datafiles”). Tablespaces can contain various types of memory segments, such as Data Segments, Index Segments, etc. Segments in turn comprise [...]

PostgreSQL, often simply Postgres, is an object-relational database management system (ORDBMS).It is released under an MIT-style license and is thus free and open source software. As with many other open-source programs, PostgreSQL is not controlled by any single company — a globalcommunity of developers and companies develops the system. However, as mentioned, this simplicity often makes the implementation of certain applications [...]

Microsoft SQL Server is an application used to create computer databases for the Microsoft Windows family of server operating systems. Microsoft SQL Server provides an environment used to generate databases that can be accessed from workstations, the Internet, or other media such as a personal digital assistant (PDA). To follow our lessons, you must have access to [...]

The MySQL database has become the world’s most popular open source database because of its high performance, high reliability and ease of use. It is also the database of choice for a new generation of applications built on the LAMP stack (Linux, Apache, MySQL, PHP / Perl / Python.) Many of the world’s largest and [...]

A DBMS is a set of software programs that controls the organization, storage, management, and retrieval of data in a database. DBMSs are categorized according to their data structures or types. The DBMS accepts requests for data from an application program and instructs the operating system to transfer the appropriate data. The queries and responses must be submitted and received according to a [...]