1.更新数据update
update 表名 set
字段1 = 值
字段2 = 值2
where condition
示例:
update mysql.user set password=password("123)where user="root‘‘ and host ="localhost";
2.删除数据
delete from 表名
where conition
示例;
delete from mysql.user where password=" ‘‘
原文：https://www.cnblogs.com/zhangqing979797/p/9800833.html