There are two types of databases, namely relational databases and non-relational databases. Relational databases mainly include: Oracle, DB2, Microsoft SQL Server, Microsoft Access, MySQL, etc. Non-relational databases mainly include: NoSql, Cloudant, MongoDb, redis, HBase, etc.

features of MySQL, SQL Server, Oracle, Sybase and DB2 databases

1. MySQL

MySQL is the most popular open source SQL database management system at present. Compared with other large databases such as Oracle, DB2 and SQL Server, MySQL has its shortcomings, but it has not reduced its popularity at all. For individuals or small and medium-sized enterprises, the function of MySQ L 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.

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

4. There are many MySQL softwares.

5. MySQL is a relational database management system.

second, SQL Server

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

iii. Oracle

Oracle has always been in a leading position in the field of database. Due to the continuous update of advanced technology, Oracle products are widely covered and become one of the most widely used relational data systems in the world.

Complete data management functions:

1. Abundance of data

2. Persistence of data storage

4. Enjoyability of data

5. Reliability of data

4. Sybase

A relational database system developed by Sybase Company of the United States is a typical client on UNIX or WindowsNT platforms.

features:

1. client/server architecture

2. truly open

3. high performance

5. DB2

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

1. Help the enterprise to find the target customers accurately:

Marketing under the guidance of market segmentation theory classifies customers into a certain category according to the demographic and psychological characteristics of consumers. Through the new generation of high-speed computers and database technology, enterprises can concentrate on fewer people, and the ultimate goal is to focus on the smallest consumption unit-specific enterprises or individuals to achieve accurate positioning.

2. Reduce marketing cost and improve marketing efficiency:

Using database can accurately find out the target customers of a certain product, and using database technology to screen consumers, the feedback rate of mailing promotional materials can be as high as 2% ~ 3%.

3. Make consumers become long-term and loyal users of the enterprise and ensure that the enterprise has a stable customer base:

Establish a database so as to analyze who the customers are and what measures to take to keep them. When the key customers of the enterprise are locked through the database, every time the enterprise holds promotional activities, it must take these customers as the main target, and try its best to improve the service and meet their needs, so as to make these customers become stable customers of the company.