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Today, the editor shares with you the common relational databases, which are not well understood by many people. Today, in order to let you know more about relational databases, the editor summarizes the following contents. Let's look down together. I'm sure you'll get something.

Relational database is a database based on relational model, which deals with the data in the database with the help of mathematical concepts and methods such as set algebra. All kinds of entities in the real world and the relationships between them are represented by relational models. The standard data query language SQL is a language based on relational database, which performs the retrieval and operation of data in relational database.

The common relational databases are mysql, SQL Server, Oracle, Sybase, DB2 and so on. Relational database is the most popular database management system at present, and its technology is relatively mature.

1. MySQL

MySQL is the most popular open source SQL database management system. Compared with other large databases such as Oracle, DB2, SQL Server and so on, MySQL has its shortcomings, but it does not reduce its popularity at all. For individuals or small and medium-sized enterprises, the function of MySQL is enough, and MySQL is open source software, so there is no need to spend a lot of energy and money to use a large paid database management system.

Features:

1. MySQL is open source and free.

2. MySQL server is reliable, easy to use and fast 7a686964616fe78988e69d8331333365653236.

3. The MySQL server works in the client / server or embedded system.

4. There are many MySQL softwares.

5. MySQL is a relational database management system.

II. SQL Server

SQL Server is a relational database management system developed by Microsoft, which is generally used to store data on Web. SQL Server provides many functions, such as rich support for XML and Internet standards, easy and secure access to data through Web, flexible, secure and Web-based application management, and easy to operate interface, which is loved by the majority of users.

III. Oracle

Oracle has been in a leading position in the field of database. Due to the continuous updating of advanced technology, Oracle products cover a wide range of products and become one of the most widely used relational data systems in the world.

Complete data management functions:

1. The large amount of data

2. Persistence of data preservation

4. Data sharing

5. Reliability of data

IV. Sybase

A relational database system developed by Sybase Sybase Company of the United States is a typical large database system under client / server environment on UNIX or WindowsNT platform.

Features:

1. Client / server architecture

2. Truly open

3. High performance

5. DB2

DB2 is a set of relational database management system developed by American IBM company, which is mainly used in large-scale application systems and has good scalability.

The above is a brief introduction of common relational databases, of course, the detailed use of the above differences still have to be used by everyone to understand. If you want to know more, welcome to follow the industry information channel!

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