ENUMs are string objects. By defining ENUMs, we allow the end-user to give correct input as in case the user provides an input that is not part of the ENUM defined data, then the query won't execute, and an error message will be displayed which says "The wrong Query". For instance, suppose we want to take the gender of the user as an input, so we specify ENUM('male', 'female', 'other'), and hence whenever the user tries to input any string any other than these three it results in an error.
ENUMs are used to limit the possible values that go in the table :
For example :
CREATE TABLE months (month ENUM 'January', 'February', 'March'); INSERT months VALUES ('April').
