参考博客:https://blog.csdn.net/tomatofly/article/details/5949070
DQL(data query language)
:数据查询语言
- select
- from
- where
DML(data manipulation language)
:数据操纵语言
- insert
- update
- delete
DDL(data definition language)
:数据定义语言,创建数据库、表、视图、索引
- create
DCL(data control language)
:数据控制语言。授权
- grant
- rollback
- commit