What's the point of “NOT NULL DEFAULT '' ”?

Question

I\'ve seen this on a lot of fields on a DB from a project I\'ve been working on, where a column will be defined not null, but will have an empty string as the default. what\'s t

Answer 1

Because sometimes, on some languages, a "select" query would give you the string NULL, and you would have to check if it's a real string with content "NULL" or it is really null.

With "" it's easiest (IMHO)