Database category, database

Database category, database

Databases are divided into relational databases (relational databases emphasize the design of tables and tables based on who they are related to; you are his, he is her, and she is his; basically, we can find out who the data is. This is a relational database)

In the past, traditional databases were relational databases.

Oracle, SQLServer, Sybase, Informix, access, DB2, mysql, vfp, etc.

The Internet is basically mysql

12 years later

Non-relational databases are popular (non-relational databases emphasize the role; they don't need to be related to anyone; such as key value... Key-Value Pair storage, which is often used for caching, features that the data query efficiency in the cache is higher than that in the database. mongodb emphasizes big data storage)

Also called nosql

Nosql is also slightly subdivided.

Key-value type, list storage type, document type, and Graphic Database Type

Common redis is the key-value type.

Mongodb is a document type

Hbase is a column storage type.