Shulou(Shulou.com)05/31 Report--

In this issue, the editor will bring you about the principles and advantages of relational database. The article is rich in content and analyzed and described from a professional point of view. I hope you can get something after reading this article.

No matter what programming language we come into contact with, we will use databases, mention databases, we have to talk about relational databases, so what exactly is relational data?

Relational database was first put forward by Edgar Coder in 1970. literally, we can know that the key word is relationship, where the relationship is a connection between each table, and we can operate the table flexibly through relations. Relational database mainly deals with data with the help of modern sets and algebraic concepts. the relational model consists of three parts: relational data structure, relational operation set and relational integrity constraints.

As we usually see ACCESS database, SQLServer database, Oracle database, DB2 database, Sybase database, mySQL database and so on are all relational databases.

With so many relational databases mentioned above, what are the advantages of relational databases?

① maintains data consistency

The cost of updating ② data is low

③ can implement Join complex query.

④ is easy to use: we just need to master the basic sql language, regardless of the underlying architecture.

⑤ is easy to maintain: there are many relational database management software that allow us to manage databases in aspects.

Shortcomings of relational databases:

① does not have a strong ability to write a large amount of data.

Insufficient changes in ② index or table structure

The processing ability of ③ that needs to return results quickly is weak.

These are the principles and advantages of the relational database shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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