SQL Not Empty instead of Not NULL

Question

I am using postgreSQL. I have a column that:

NOT NULL

However when I want to insert a row with an empty string as like:

\'\'
         


        

Answer 1

Add a constraint to column definition. For example something like:

ads character varying(60) NOT NULL CHECK (ads <> '')

For more, see http://www.postgresql.org/docs/current/static/ddl-constraints.html