建立用戶，授權數據庫：

mysql> create user 'byrd'@'localhost' identified by 'admin123';    #建立主機為localhost，密碼為admin123的用戶byrd
Query OK, 0 rows affected (0.05 sec)
mysql> show grants for 'byrd'@'localhost';    #查看byrd權限，USAGE表示連接權限
+-------------------------------------------------------------------------------------------------------------+
| Grants for [email protected]                                                                                   |
+-------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'byrd'@'localhost' IDENTIFIED BY PASSWORD '*01A6717B58FF5C7EAFFF6CB7C96F7428EA65FE4C' |
+-------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> select user,host from mysql.user;
+------+-----------+
| user | host      |
+------+-----------+
| root | 127.0.0.1 |
| root | ::1       |
| root | lamp      |
| byrd | localhost |
| root | localhost |
+------+-----------+
5 rows in set (0.00 sec)
mysql> grant all on gbk.* to 'byrd'@'localhost';    #用戶byrd、主機localhost對數據庫gbk擁有所有權限
Query OK, 0 rows affected (0.01 sec)

mysql> show mysqls for 'byrd'@'localhost';
+-------------------------------------------------------------------------------------------------------------+
| Grants for [email protected]                                                                                   |
+-------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'byrd'@'localhost' IDENTIFIED BY PASSWORD '*01A6717B58FF5C7EAFFF6CB7C96F7428EA65FE4C' |
| GRANT ALL PRIVILEGES ON `gbk`.* TO 'byrd'@'localhost'                                                       |