Command Reference : String and Date Function Reference
Syntax: @neqna(str1, str2)
Argument 1: string, str1
Argument 2: string, str2
Return: integer
Tests for inequality of str1 and str2, treating null strings as ordinary blank strings, and not as missing values. Strings which test as equal return a 0, and 1 otherwise.
@neqna("abc", "abc")
returns a 0, while
@neqna("", "def")
returns a 1.
See also @isempty and @eqna.