mysql的增删改查及复制与修改密码
创建数据库
create database name;
删除数据库
drop database name:
使用数据库
use wg(数据库名)
创建数据库中的表
create table stu (xingming char(10));
查看表结构
desc stu;
查看表内容
select* from stu
数据库的复制
数据库密码的修改
create user 'jack'@'localhost' identified by '123';
更改密码
set password for 'tom'@'localhost' = password( '123' );
update mysql.user set password=password( '123' ) where user='tom' and host='localhost';
更改mysql的root用户密码
vim /etc/my.cnf
skip-grant-tables (跳过权限表)
systemctl restart mysql
使用root用户,空密码登录mysql
update mysql.user set password=password( '123' ) where user='tom' and host='localhost';
mysql -uroot-p123
增加用户权限
grant insert,select on *.* to 'tom'@'localhost';
grant insert,select on bw.wg to 'tom'@'localhost';
删除用户权限
revoke all on *.* from 'tom'@'localhost';