What are the commonly used database management systems?

Common database systems include IBM's DB2, Oracle's Oracle, Microsoft's SQL and Access, Sybase's Sybase, MySQL AB's MySQL, etc. Different database systems have different characteristics, as well as relatively independent application areas and user support.

DB2:

A relational database system developed by IBM. DB2 is mainly used in large-scale application systems. It has good scalability and can support everything from mainframe to single-user environments. It is applied to OS/2.Windows and other platforms.

DB2 provides a high level of data utilization, integrity, security, recoverability, and execution capabilities for small to large-scale applications, with platform-independent basic functions and SQL commands.

Oracle:

Oracle is a database product developed at the same time as DB2, and it is also the second database product to use SQL. Oracle has learned many advantages from products such as DB2, while avoiding IBM's bureaucracy and over-academicism, and boldly introduced many new theories and features, so Oracle is very good in terms of functionality, performance and usability.

Oracle has launched versions with different function combinations for users of different sizes and application needs, and the supported operating systems can also be said to be fully covered, including UNIX, Linux and Windows, so the Oracle database is not only suitable for large Company selection can meet the needs of enterprise users of various sizes.

SQL and Access:

The operating system environment for SQL and Access is Microsoft Windows. At present, server architectures that support Windows operating systems are very common. It can be said that all mainstream processor architectures have good support, including IBM's Power processor and Sun's UltraSparc processor. So in this regard, there are no restrictions on database servers based on these two major database software.

SQLSever database management system has comprehensive functions and high efficiency, and can be used as a database management system for large and medium-sized enterprises and units. It is launched by Microsoft and inherits the friendly interface, easy to learn and use of Microsoft products.

Sybase:

Sybase is a relational database system developed by the American Sybase Company. It is a typical client/server environment on UNIX or Windows NT platforms. large database system. Sybase provides a set of application programming interfaces that can be integrated with non-Sybase data sources and servers, allowing data to be copied between multiple databases, and is suitable for creating multi-tier applications.

MySQL:

MySQL is a small relational database management system developed by the Swedish MySQL AB company. At present, MySQL is widely used in small and medium-sized systems, especially in network applications with a larger user base. MySQL does not provide some functions that are rarely used in small and medium-sized systems, so MySQL takes up very little resources and is easier to install, use and manage.

MySQL can be used in a windows environment, but its most classic combination is Apache PHP Mysql. There are now many small websites with this combination. Such websites have very low server configuration requirements. Of course, due to the limitations of the database itself, MySQL is not suitable for commercial applications with large visits.

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