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Editor to share with you what are the data manipulation functions of sql, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

The data manipulation function of sql mainly includes data insertion, deletion, modification and query. The data manipulation function of SQL mainly includes the data insertion, deletion and modification of basic tables and views, especially the strong data query function, while the data control function is mainly to control the access rights of users to ensure the security of the system.

The data manipulation function of sql mainly includes data insertion, deletion, modification and query.

Structured query language (Structured Query Language) referred to as SQL, is a special purpose programming language, is a database query and programming language, used to access data and query, update and manage relational database systems.

Functionally, SQL can be divided into three parts: data definition, data manipulation and data control.

1. SQL data definition function: it can define the three-level schema structure of the database, namely, external schema, global schema and internal schema structure. In SQL, the outer schema is also called View, and the global schema is referred to as Schema. The inner schema is automatically implemented by the system according to the database schema, and generally does not need to be asked by the user.

2. SQL data manipulation function: including data insertion, deletion and modification of basic tables and views, especially with strong data query function.

3. The data control function of SQL: the main function is to control the access rights of users to ensure the security of the system.

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