title: Do not need to add 0 to int datatype in mysql from php code
body: <p>I am working on a project where I am using database driven dropdown lists on which i also add Other whose value is "0" with other values id coming from database. and these IDs are using as the value of the particular drop down list.
  Now problem is this, I am using int data type in the database table, And I does not select any value from the table for drop down list but it add 0 to the table. And I do not need to add 0 in the database table. I also used NULL as default value for the column but it stored the value as 0.
  Please solve my problem, How i will store the value so that the value will not zero when i does not select anything in the select box.
  Thank you..</p>