SQL DELETE 语句详解

Posted 2020-07-18 Allyte

DELETE 语句

DELETE 语句用于删除表中的行。

语法

DELETE FROM 表名称 WHERE 列名称 = 值

Person:

LastName	FirstName	Address	City
Gates	Bill	Xuanwumen 10	Beijing
Wilson	Fred	Zhongshan 23	Nanjing

删除某行

"Fred Wilson" 会被删除：

DELETE FROM Person WHERE LastName = ‘Wilson‘ 

结果:

LastName	FirstName	Address	City
Gates	Bill	Xuanwumen 10	Beijing

删除所有行

可以在不删除表的情况下删除所有的行。这意味着表的结构、属性和索引都是完整的：

DELETE FROM table_name

或者：

DELETE * FROM table_name