Hi Dragan

The question is for each field the valid values
can be actual value (know to the user) or null (for value not known to the user) in the sql field.

e.g. if we have a field called salary then the valid
values can be Zero to some figure. But if the user
does not have the information for that field then
the value should be null.

Please note that in above example even Zero
is a valid value. Hence Zero and null value
have there own meaning.

Zero salary can be valid for a director of a company.
Null value can be valid for a person for whom we don't have any information.

Question here is how should be our data entry screen.


Regards
Upendra Nayak