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

Editor to share with you what sql refers to. I hope you will get something after reading this article. Let's discuss it together.

What is sql?

SQL (structured Query Language: structured query language) is a purpose-specific programming language used to manage relational database management systems (RDBMS) or stream processing in relational flow data management systems (RDSMS).

SQL is based on relational algebra and tuple relational calculus, including a data definition language and a data manipulation language. The scope of SQL includes data insertion, query, update and deletion, database schema creation and modification, and data access control. Although SQL is often described as, and largely a form of declarative programming (4GL), it also contains procedural elements.

SQL is the first commercial language implementation of Edgar Cod's relational model, which was described in an influential paper entitled "A Relational Model for large shared databases" in 1970. Although SQL is not designed entirely according to Cod's relational model, it is still the most widely used database language.

SQL became a standard of the American National Standards Institute (ANSI) in 1986 and the International Organization for Standardization (ISO) in 1987. Since then, the standard has undergone a series of updates and added a large number of new features. Despite the existence of this standard, most of the SQL code is not completely cross-platform in different database systems.

After reading this article, I believe you have a certain understanding of "what sql means". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for your reading!

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