====== MySQL 암복호화 ======

^ encode | 양방향 암호화 |
^ decode | 양방향 복호화 |
^ password | 단방향 암호화 |

===== 예제 =====
<code sql>
select AdminNames
     ,encode(AdminNames,'securekey') as encode
     ,decode(encode(AdminNames,'securekey'),'securekey') as decode
     ,password(AdminNames) as password
from admin
</code>