转 http://www.cnblogs.com/cnblogsfans/archive/2009/09/21/1570942.html
mysql默认root用户没有密码，输入mysql –u root 进入mysql
1、初始化root密码
进入mysql数据库 UPDATE user SET Password = PASSWORD(\'1234\') WHERE user = \'root\';或
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mysql>update user set password=PASSWORD(‘123456’) where User=\'root\';
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2、允许mysql远程访问,可以使用以下三种方式:
a、改表。
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mysql -u root –pmysql>use mysql;mysql>update user set host = \'%\' where user = \'root\';
mysql>select host, user from user;
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b、授权。
例如，你想root使用123456从任何主机连接到mysql服务器。
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mysql>GRANT ALL PRIVILEGES ON *.* TO \'root\'@\'%\' IDENTIFIED BY \'123456\' WITH GRANT OPTION;
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如果你想允许用户jack从ip为10.10.50.127的主机连接到mysql服务器，并使用654321作为密码
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mysql>GRANT ALL PRIVILEGES ON *.* TO \'jack\'@’10.10.50.127’ IDENTIFIED BY \'654321\' WITH GRANT OPTION;
mysql>FLUSH RIVILEGES |
c:在安装mysql的机器上运行：
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//进入MySQL服务器d:\mysql\bin\>mysql -h localhost -u root//赋予任何主机访问数据的权限mysql>GRANT ALL PRIVILEGES ON *.* TO \'root\'@\'%\' WITH GRANT OPTION
//使修改生效mysql>FLUSH PRIVILEGES
//退出MySQL服务器mysql>EXIT |