SQL DELETE 语句

DELETE 语句

DELETE 语句用于删除表中的行。

语法

  1. 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：

  1. 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：

  1. DELETE FROM table_name

或者：

  1. DELETE * FROM table_name