Mysql 誤刪 root 賬戶（MAC)

mysql 允許賬號 drop 自己，如果 root 賬戶把自己 drop 了。

有兩種方式

1, 以安全模式啓動

以安全模式啓動 MYSQL，跳過權限驗證

sudo /usr/local/mysql/bin/mysqld_safe --skip-grant-tables &

或者

修改 my.cnf 並重啓 (本質上和上面方法一樣，都是跳過權限驗證，更麻煩）

sudo vim /etc/my.cnf

[mysqld]
skip-grant-tables
port = 3306

2, 然後登陸

mysql -h127.0.0.1

執行
INSERT INTO mysql.user 
SET user = 'root', 
host = '%', 
authentication_string =Password('123456'), 
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',
Alter_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',
Event_priv = 'y',
Trigger_priv = 'y',
Create_tablespace_priv = 'y',
ssl_cipher = '',
x509_issuer = '',
x509_subject = '';