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

We do not allow nulls because programmatically accessing a field from a datatable with a DBnull value causes an exception, while an empty string has a value and therefore does not error.