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sql 关联删除

删除多表关联数据的三种方法1、级联删除 create table a(id varchar(20) primary key,password varchar(20) not null)create table b(id int identity(1,1) primary key,name varchar(50) not null,userId varchar(20),foreign key (userId) ref...

mysql中多表关联删除,怎样做? 两个表比如delete后面是要删除的表on是关联的字段where是条件 delete a,b from `ecs_goods` as a join `ecs_goods_gallery` as b on a.goods_id = b.goods_id where a.id ='123' 三个表(依次类推) delete a,b,c...

delete from tableA where 关联键 in(select 外键 from tableB where bookID=1) delete from tableB where bookid= 1 只能一个个删除,你先删除主表,条件为查出来的。再删子表。(如果没有级联设置)

删除主-从表的记录可以建立简单存储过程来实现: CREATE PROCEDURE [存储过程] ( @Id VARCHAR(50) ) AS DELETE [子表] WHERE [关联Id] = @Id DELETE [主表] WHERE [Id] = @Id GO 执行方法:EXECUTE [存储过程] @Id

DELETE FROM table WHERE date in('c','e','f') 结构化查询语言(Structured Query Language)简称SQL,结构化查询语言是一种数据库查询和程序设计语言,用于存取数据以及查询、更新和管理关系数据库系统; 用外键关联删除,把B表的uid设成外键关...

删除主-从表的记录可以建立简单存储过程来实现: CREATE PROCEDURE [存储过程] ( @Id VARCHAR(50) ) AS DELETE [子表] WHERE [关联Id] = @Id DELETE [主表] WHERE [Id] = @Id GO 执行方法:EXECUTE [存储过程] @Id

方法1:delete 表a from 表a A join 表b B on A.name=B.name 方法2:delete from 表a where name in(select name from 表b) 这样就可以删除表a中有表b中的Name相同的记录,而不影响表b中的内容

delete from B where id in (select A.id from A, B where A.身份证号码=B.身份证号码 并且 A.金额=B.金额 )

DELETE FROM table WHERE date in('c','e','f') 结构化查询语言(Structured Query Language)简称SQL,结构化查询语言是一种数据库查询和程序设计语言,用于存取数据以及查询、更新和管理关系数据库系统; 用外键关联删除,把B表的uid设成外键关...

SQL 关键字 delete ,inner join 假如定义A表,有字段a,b ,类型都为int B 表有字段b,c 类型都为int 下列是关联查询SQL 如下: select * from A inner join B on A.b=B.b 删除SQL 语句: delete from A where a in (select A.a from A inner j...

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