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立此存照(3) Oracle SQL 语句的分类

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Release: 2016-06-07 15:27:51
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1.数据操纵语言DML(Data Manipulation Language):包括对数据的检索(查询)和更新(插入,修改,删除)语句。[增删改查语句] 2.数据定义语言DDL(Data Definition Language):包括对数据库进行的创建,删除,修改语句。 3.数据控制语言DCL(Data Control Language):包括

1.数据操纵语言DML(Data Manipulation Language):包括对数据的检索(查询)和更新(插入,修改,删除)语句。[增删改查语句]

2.数据定义语言DDL(Data Definition Language):包括对数据库进行的创建,删除,修改语句。

3.数据控制语言DCL(Data Control Language):包括设置或更改用户数据库角色和权限的语句(grant,revoke,deny)。

4.事物控制语言TCL(Transaction Control Language):包括commit, rollback。

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