mysql的root账户删除了怎么办？

.关闭现有mysql.不加载grant_tables而进入mysqlD:\>mysqld-nt --skip-grant-tables.新开一个cmd窗口,然后按下面执行进入mysqlD:\>mysqlWelcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 1 to server version: 5.0.27-community-ntType 'help;' or '\h' for help. Type '\c' to clear the buffer.mysql> use mysqlDatabase changedmysql> select * from user;Empty set (0.00 sec)mysql> insert into user set user='root',ssl_cipher='',x509_issuer='',x509_subject='';Query OK, 1 row affected, 3 warnings (0.00 sec)(这时可能会提示某字段如ssl_cipher无默认值, 只要加上,ssl_cipher=''; 其字段如有提示依次添加就OK了)mysql> update user set Host='localhost',select_priv='y', insert_priv='y',update_priv='y',delete_priv='y',create_priv='y',drop_priv='y',reload_priv='y',shutdown_priv='y',Process_priv='y',file_priv='y',grant_priv='y',References_priv='y',index_priv='y',create_user_priv='y',show_db_priv='y',super_priv='y',create_tmp_table_priv='y',Lock_tables_priv='y',execute_priv='y',repl_slave_priv='y',repl_client_priv='y',create_view_priv='y',show_view_priv='y',create_routine_priv='y',alter_routine_priv='y',create_user_priv='y' where user='root';mysql> quitBye关闭mysqlD:\> mysqladmin shutdown2)带权限正常启动mysqlD:\>mysqld-nt 3)新开一个cmd窗口D:\>mysql -u rootWelcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 2 to server version: 5.0.27-community-ntType 'help;' or '\h' for help. Type '\c' to clear the buffer.mysql> update user set password=password('123456') where user='root';Query OK, 1 row affected (0.00 sec)Rows matched: 1 Changed: 1 Warnings: 0mysql> flush privileges;mysql> quit试下没有密码时进入mysqlD:\>mysql -u rootERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)使用密码进入mysqlD:\>mysql -u root -p123456Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 5 to server version: 5.0.27-community-ntType 'help;' or '\h' for help. Type '\c' to clear the buffer.mysql>============[OK]=====================