ENUMs in MySQL

1.Using Enum can restrict the number of values that can be allowed to go inside a table.
  ENUM is used to limit the values that persist in the table.

2.Example :

 A> ENUM for Colors ENUM('blue','yellow','green')

 We can use an insert statement like Insert colors values ('red').

 B>CREATE TABLE months (month ENUM 'January', 'February', 'March',);
   INSERT months VALUES ('April');

Please check below link .

http://www.mysqlfaqs.net/mysql-faqs/Data-Types/What-are-ENUM-and-SET-Data-Types-in-MySQL

Hope this will help you.

Thanks.