How to choose the right database?

How to choose the right database?

First select the appropriate database type according to the business scenario, such as hierarchical database, network database and relational database; finally, make the selection based on the business scenario, read and write performance and product features and advantages. Corresponding database product.

Hierarchical database

The hierarchical model database system is the earliest successfully developed database system. The most successful example of this kind of database is IMS.

The full name of IMS is Information Management System, which was successfully developed by IBM.

IMS was put into operation in 1969. The earliest versions are IMS/360-1 and IMS/360-2. The more recent version is IMS/VS DL/1, which runs with the support of the operating system DOS/VS (Disk Operation System/Virtual Storage).

Network database

The network database must have real-time and efficient characteristics. It must be able to process data operations of multiple terminals at the same time in parallel, and it must also be able to withstand network attacks. Invasion of hackers and viruses.

Network database technology is very important for network management systems, because for most systems, the database is the key to data recording. Without the database, the normal operation of the management system is impossible, and Network-based management systems require network-based database technology to support and maintain. In order to operate more securely, network databases generally contract with firewall tools to judge and defend against bad access users through network firewalls. Customers who are particularly concerned about data security will They tend to choose high-priced network server hosts to obtain more quality-assured virus protection systems and network firewall systems to ensure the security of their own data.

Relational database

Relational database is a database based on the relational database model. It uses concepts and methods such as set algebra to process data in the database. It is also a table that is organized into a set of formally descriptive tables. The essence of this form is to load a special collection of data items. The data in these tables can be accessed or recalled in many different ways. Database tables need to be reorganized. A relational database definition results in a table of metadata or a formal description of tables, columns, ranges, and constraints. Each table (sometimes called a relationship) contains one or more data types represented by columns. Each row contains a unique data entity of the type defined by the column. When creating a relational database, you can define the range of possible values ​​for a data column and further constraints that may apply to that data value. The SQL language is a standard user and application interface to a relational database. The advantage is that it is easy to expand, and after the initial database creation, a new data type can be added without modifying all existing applications. Mainstream relational databases include oracle, db2, sqlserver, sybase, mysql, etc.

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