请参考此链接：使用varchar作为主键值是否可以？ [ ^ ]



就个人而言，我没有使用varchar字段作为主键。在我看来，这是一个坏主意;（

Please, refer this link: Using varchar for primary key value is ok?[^]

Personally i'm not using varchar field as a primary key. In my opinion it's a bad idea ;(