I cannot save a null value through the data tab in the multi-row updates pane. It always gives me an error such as "Invalid number". It works fine through normal SQL update statement. Is there a preference somewhere to turn this on?
thanks in advance
Just use the backspace key to obliterate any existing value -- that makes it null. Afterwards, if you refresh or close/reopen the object, the data tab will display any null as the value set in Tools | Preferences | Database | Advanced | Display Null Value As .
SQL Developer Team