既存のテーブルがあり、Grant コマンドを使用して特権のホスト部分を更新したい
mysql> show grants
-> ;
+------------------------------------------------------------------------------------------------------------+
| Grants for ssc@localhost |
+------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'ssc'@'localhost' IDENTIFIED BY PASSWORD '*ABCDEFABCDEF' |
| GRANT ALL PRIVILEGES ON `ssc`.* TO 'ssc'@'localhost' WITH GRANT OPTION |
+------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)