Is blank value represent with '' or "" ?

[rmgerasimov]

Hi all, 

I want to check for black values. My question is how blank value is represent. With '' or with ""?

column_name != '';

or

column_name != "";

[Or · Accepted solution]

Len(Column_Name) = 0 will catch both blanks and nulls.

Column_Name = '' will catch just blanks.