mysql 恢复被删的 root 账户

.关闭现有mysql
.不加载grant_tables而进入mysql
D:\>mysqld-nt --skip-grant-tables OR mysqld_safe --skip-grant-tables
.新开一个cmd窗口,然后按下面执行
D:\>mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1 to server version: 5.0.27-community-nt
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> use mysql
Database changed
mysql> 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> quit
Bye
关闭mysql
D:\> mysqladmin shutdown
2)带权限正常启动mysql
D:\>mysqld-nt OR
3)新开一个cmd窗口
D:\>mysql  -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2 to server version: 5.0.27-community-nt
Type '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: 0
mysql> flush privileges;
mysql> quit
试下没有密码时进入mysql
D:\>mysql -u root
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
使用密码进入mysql
D:\>mysql -u root -p123456
Welcome to the MySQL monito