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HomeDatabaseMysql Tutorial用MySQL GRANT语句来增添新用户实操

我们今天主要向大家讨论的是用MySQL GRANT语句来增添新的用户的实际操作方案,以及对图解MySQL数据库的实际安装步骤与具体操作,你如果对其有兴趣的话你就可以点击以下的文章进行观看了。 如何实现MySQL(和PHP搭配之最佳组合)数据库的备份与恢复 MySQL(和PHP

我们今天主要向大家讨论的是用MySQL GRANT语句来增添新的用户的实际操作方案,以及对图解MySQL数据库的实际安装步骤与具体操作,你如果对其有兴趣的话你就可以点击以下的文章进行观看了。

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MySQL(和PHP搭配之最佳组合)数据库备份与恢复

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下面的例子显示如何使用MySQL(和PHP搭配之最佳组合)客户安装新用户。这些例子假定权限已缺省被安装。

这意味着为了改变,你必须在MySQL(和PHP搭配之最佳组合)正在运行同一台机器上,你必须作为MySQL(和PHP搭配之最佳组合) root用户连接,并且root用户必须对MySQL(和PHP搭配之最佳组合)数据库有insert权限和reload管理权限。另外,如果你改变了root用户口令,你必须如下的MySQL(和PHP搭配之最佳组合)命令指定它。

你可以通过发出MySQL GRANT语句增加新用户:

<ol class="dp-xml"><li class="alt"><span><span>shell</span><span class="tag">></span><span> MySQL(和PHP搭配之最佳组合) </span><span class="attribute">--user</span><span>=</span><span class="attribute-value">root</span><span> MySQL(和PHP搭配之最佳组合) <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> GRANT ALL PRIVILEGES ON *.* <br>TO monty@localhost IDENTIFIED BY 'something' WITH GRANT OPTION; <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> GRANT ALL PRIVILEGES ON *.* TO monty@"%" IDENTIFIED BY 'something' WITH GRANT OPTION; <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> MySQL GRANT RELOAD,PROCESS ON *.* TO admin@localhost; MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> MySQL GRANT USAGE ON *.* TO dummy@localhost; </span></span></li></ol>

这些GRANT语句安装3个新用户:

monty:可以从任何地方连接服务器的一个完全的超级用户,但是必须使用一个口令('something'做这个。注意,我们必须对monty@localhost和monty@"%"发出MySQL GRANT语句。

如果我们增加localhost条目,对localhost的匿名用户条目在我们从本地主机连接接时由MySQL(和PHP搭配之最佳组合)_install_db创建的条目将优先考虑,因为它有更特定的Host字段值,所以以user表排列顺序看更早到来。

admin:可以从localhost没有一个口令进行连接并且被授予reload和process管理权限的用户。这允许用户执行MySQL(和PHP搭配之最佳组合)admin reload、MySQL(和PHP搭配之最佳组合)admin refresh和MySQL(和PHP搭配之最佳组合)admin flush-*命令,还有MySQL(和PHP搭配之最佳组合)admin processlist。

没有授予数据库有关的权限。他们能在以后通过发出另一个GRANT语句授权。

dummy:可以不用一个口令连接的一个用户,但是只能从本地主机。全局权限被设置为'N'--USAGE权限类型允许你无需权限就可设置一个用户。它假定你将在以后授予数据库相关的权限。

你也可以直接通过发出INSERT语句增加同样的用户存取信息,然后告诉服务器再次装入授权表:

<ol class="dp-xml"><li class="alt"><span><span>shell</span><span class="tag">></span><span> MySQL(和PHP搭配之最佳组合) </span><span class="attribute">--user</span><span>=</span><span class="attribute-value">root</span><span> MySQL(和PHP搭配之最佳组合) <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO user <br>VALUES('localhost','monty',PASSWORD('something'), <br>'Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y') <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO user <br>VALUES('%','monty',PASSWORD('something'), 'Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y') <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO user SET </span><span class="attribute">Host</span><span>=</span><span class="attribute-value">'localhost'</span><span>,</span><span class="attribute">User</span><span>=</span><span class="attribute-value">'admin'</span><span>, </span><span class="attribute">Reload_priv</span><span>=</span><span class="attribute-value">'Y'</span><span>, </span><span class="attribute">Process_priv</span><span>=</span><span class="attribute-value">'Y'</span><span>; <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO user (Host,User,Password) VALUES('localhost','dummy',''); <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> FLUSH PRIVILEGES; </span></span></li></ol>

取决于你的MySQL(和PHP搭配之最佳组合)版本,对上述,你可能必须使用一个不同数目'Y'值(在3.22.11以前的版本有更少的权限列)。对admin用户,只用在3.22.11开始的版本具有的更加可读的INSERT扩充的语法。

注意,为了设置一个超级用户,你只需创造一个user表条目,其权限字段设为'Y'。不需要db或host表的条目。

在user表中的权限列不是由最后一个INSERT语句明确设置的(对dummy用户),因此那些列被赋予缺省值'N'。这是MySQL GRANT USAGE做的同样的事情。

下列例子增加一个用户custom,他能从主机localhost、server.domain和whitehouse.gov连接。他只想要从localhost存取bankaccount数据库,从whitehouse.gov存取expenses数据库和从所有3台主机存取customer数据库。他想要从所有3台主机上使用口令stupid。

为了使用GRANT语句设置个用户的权限,运行这些命令:

<ol class="dp-xml"><li class="alt"><span><span>shell</span><span class="tag">></span><span> MySQL(和PHP搭配之最佳组合) </span><span class="attribute">--user</span><span>=</span><span class="attribute-value">root</span><span> MySQL(和PHP搭配之最佳组合) MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> MySQL GRANT SELECT,<br>INSERT,UPDATE,DELETE,CREATE,DROP ON bankaccount.* TO custom@localhost IDENTIFIED BY 'stupid'; <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP ON expenses.* <br>TO custom@whitehouse.gov IDENTIFIED BY 'stupid'; <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> MySQL GRANT SELECT,<br>INSERT,UPDATE,DELETE,CREATE,DROP ON customer.* TO custom@'%' IDENTIFIED BY 'stupid'; </span></span></li></ol>

通过直接修改授权表设置用户权限,运行这些命令(注意,在结束时FLUSH PRIVILEGES):

<ol class="dp-xml"><li class="alt"><span><span>shell</span><span class="tag">></span><span> MySQL(和PHP搭配之最佳组合) </span><span class="attribute">--user</span><span>=</span><span class="attribute-value">root</span><span> MySQL(和PHP搭配之最佳组合) <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO user (Host,User,Password) VALUES('localhost','custom',PASSWORD('stupid')); <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO user (Host,User,Password) VALUES('server.domain','custom',PASSWORD('stupid')); <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO user (Host,User,Password) VALUES('whitehouse.gov','custom',PASSWORD('stupid')); <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO db (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv, <br>Create_priv,Drop_priv) VALUES ('localhost','bankaccount','custom','Y','Y','Y','Y','Y','Y'); <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO db (Host,Db,User,Select_priv,Insert_priv,<br>Update_priv,Delete_priv, Create_priv,Drop_priv) VALUES ('whitehouse.gov','expenses','custom','Y','Y','Y','Y','Y','Y'); <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> INSERT INTO db (Host,Db,User,Select_priv,Insert_priv,<br>Update_priv,Delete_priv, Create_priv,Drop_priv) VALUES('%','customer','custom','Y','Y','Y','Y','Y','Y'); <br>MySQL(和PHP搭配之最佳组合)</span><span class="tag">></span><span> FLUSH PRIVILEGES; </span></span></li></ol>


 


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