title: Mysql Table Column Cannot Be Null
body: <p>I have created a table with three columns, Id , Name , Quantity.
  It appears that when I am trying to insert a row with at least one null column or when i am trying to set the default value of a column to NULL the database throws an error.
  <strong><em>#1048 - Column 'Quantity' cannot be null</em></strong> </p>
  
  <p>How can I set NULL as a valid value for a column?</p>