What are the common databases?
Common databases include: 1. Oracle database; 2. DB2 database; 3. SQL Server database; 4. PostgreSQL database; 5. MySQL database; 6. Sybase database.
Common databases include:
1, Oracle database
Oracle is a relational database management system from Oracle Corporation. It has always been in a leading position in the field of database products. The system has good portability, easy use and strong functions, and is suitable for various large, medium, small and microcomputer environments. Currently, Oracle's relational database products have the largest market share.
2. DB2 database
DB2 database was developed by IBM. It is not limited to its own operating system, but also adopts an open policy. In addition, it also has There are many versions, such as: DB2 Workgroup Edition (DB2 Workgroup Edition), DB2 Enterprise Edition (DB2 Enterprise Edition) and DB2 Personal Edition (DB2 Personal Edition), etc. The data management functions of each version are the same to facilitate the use of operators.
3. SQL Server database
SQL Server database is a relational database system developed by Microsoft Corporation in the United States. It has good support for all mainstream server skeletons. support. SQL statements can be used to perform a variety of operations, such as updating data in the database. Its scalability, high performance, and advanced system management are outstanding in some aspects.
4. PostgreSQL database
PostgreSQL was developed by POSTGRES from the Department of Computer Science at the University of California, Berkeley. It has now been renamed PostgreSQL. It has very complete features and the object software is very Free, including support for the richest data types in the world.
5. MySQL database
MySQL is an open source relational database management system. It is open to the outside world and is free to use. Its functions are not very powerful. The performance is also average. It still has certain advantages in small offices. The MySQL database itself also has certain limitations and is not suitable for commercial applications with large access volumes.
6. Sybase database
Sybase database is a software launched by Sybase. There are three main versions: one is the version running under the UNIX operating system; the other is The version that runs under Novell Netware environment, and the third one is the version that runs under Windows NT environment. Sybase database is client-based, truly open to the outside world, and has high performance. There are still several attractive places: programmable databases, event-driven triggers, and multi-threading of the structural system.
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