更新语句

标签：class   username   use   name   password   date   单表   lang   更新   

单表更新，一定要加where，否则更新全表数据

update user
set username=‘hahah‘, password=‘666666‘, name=‘哈哈哈‘
where id=16;

多表更新

-- 修改财务部的密码
-- sql92
update user t1, department t2
set t1.password = ‘666666‘
where t1.department_id = t2.id 
and t2.name = ‘财务‘;

-- sql99
update user t1
join department t2
on t1.department_id = t2.id 
set t1.password=‘888888‘
where t2.name = ‘财务‘;

更新语句

标签：class   username   use   name   password   date   单表   lang   更新   

原文地址：https://www.cnblogs.com/qixioa/p/13669942.html