What are the three database models
This article will explain in detail which three kinds of database models are available to you. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.
What is a database?
To put it simply, a database (English Database) is a warehouse for storing data, which is organized and stored according to certain data results (the data structure refers to the organizational form of the data or the relationship between the data). We can manage the data in the database through a variety of methods provided by the database. The nature of the database is the same as the warehouse where sundries are stored in our lives. The only difference is what is stored.
Types of databases
There are three popular database models in the early days, which are hierarchical database, network database and relational database. In today's Internet, the most commonly used database models are mainly two kinds, namely, relational database and non-relational database.
Relational database
The relational database model sums up the complex data structure into a simple binary relationship (that is, two-dimensional table form).
Commonly used relational databases:
MySQL, MariaDB database, SQL Server database, Access database
Non-relational database
Non-relational database is also called NoSQL database, and NOSQL originally means "Not Olnly SQL".
It refers to the non-relational database, not the meaning of "NoSQL". Therefore, the emergence of NoSQL is not to completely negate the non-relational database, but as an effective supplement to the traditional relational database. NOSQL database can play an unimaginable high efficiency and high performance in specific scenarios.
Common non-relational databases:
Memcached (key-value), Redis (key-value), MongoDB (Document-oriented), Cassandra (Column-oriented)
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