mysql修改root密码
修改root密码命令如下，dos下登录mysql：
命令:mysql> use mysql
Database changed
mysql> update user set password=PASSWORD('123456') where user='root';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
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不要忘记重启mysql?
