If you are unlucky enough to have the surname "Null", you basically don't exist, as far as some SQL servers are concerned iStock It is a troublesome process registering for an account with online ...

You can define data fields to not store null data by specifying the NU option in data definition statements. In normal data storage (that is, NU not specified), a null value is represented by two ...

Null or nonexistent data gets complicated when the application expects a data value and gets nothing or unexpected values; that's when you must perform coding that properly handles these situations to ...