zoukankan      html  css  js  c++  java
  • MySQL创建用户

    1、创建用户:
    语法:

    create user 用户1@主机名 identified by '123'|password ''
    
    123:*23AE809DDACAF96AF0FD78ED04B6A265E05AA257

    同时创建用户liu1 123 ,明文

    name 123 password


    例1:

    create user name1@localhost identified by '123',
    name2@localhost identified by password '*23AE809DDACAF96AF0FD78ED04B6A265E05AA257';

    例2:
    对用户进行重命名:

    把用户name1@localhost改成name3@localhost

    rename user name1@localhost to name3@localhost;

    例3:
    把用户name3的密码改成456;

    set password[for user] =password(str)|='加密后的字符串'


    方法一:

    set password for name3@localhost =password('456');

    方法2:

    set password for name3@localhost='*531E182E2F72080AB0740FE2F2D689DBE0146E04';
    
    456:*531E182E2F72080AB0740FE2F2D689DBE0146E04

    例4:

    drop user name3@localhost,name2@localhost;


    分配权限:
    grant
    语法:
    grant 权限(all,select/update/insert/create user,select(studentno,studenname))
    on *//当前库的所有的表的权限
    on *.*//所有库的所有表的权限
    on db_school.tb_student//具体的库的具体的某个表
    on db_school.*//db_school库的所有表
    on tb_student//当前的库里的tb_student;
    on db_name.routine_name//某个库的存储过程或者是函数
    to zhangsan1@localhost
    identified by '456';
    例:
    授予用户zhangsan在数据库db_school的表tb_student上拥有对列studentno的select权限;

    grant select(studentno)on db_school.tb_student to zhangsan@localhost;

    例2;
    授予用户lisi在数据库db_school中所有表select、update和insert的权限,并且指定口令为456;

    grant select,update,insert on db_school.* to lisi@localhost identified by'456';
    grant select,update,insert on db_school.* to lisi@localhost identified by '456';

    例:
    给李明分配所有数据库的所有表的所有权限;

    all grant all on *.* to liming@localhost;
    grant create user on *.* to liming@localhost;
    with grant option
    
    max_queries_per_hour count//限制每小时可以查询数据库的次数
    
    max_update_per_hour count//限制每小时可以更新数据库的次数
    
    max_connections_per_hour count//限制每小时可以连接数据库的次数
    
    max_user_connections count//限制同时连接MySQL的最大用户数;

    例:
    限制用户kkk@localhost每小时只能更新数据库db_school的tb_student表一次;

    grant update on db_school.tb_student to kkk@localhost identified by '123' with max_updates_per_hour 2;

     回收权限

    revoke select on *.* from 'name'@'%';
    
    revoke all privileges,grant option from 'liu'@'%';
  • 相关阅读:
    css下背景渐变与底部固定的蓝天白云
    indy10中idtcpclient的使用问题[和大华电子称数据交换]
    cliendataset中自增长字段的处理
    和大华电子称进行对数据通讯
    cxgrid主从表的困惑
    基于xml基类的web查询
    关于屏幕文件
    基于xml文件查询的xml文件之生成篇
    关于400改程序
    Tapestry Spring Hibernate整合工作小结[摘]
  • 原文地址:https://www.cnblogs.com/Jackbk/p/12693640.html
Copyright © 2011-2022 走看看