I don't know what TOAD or HEIDI are and I don't see how they are relevant to something simple like this.
Yes, you can create a view and then use the field names in that view during an update.
I would *NOT* recommend doing this with a view that is built up from a join. You WILL have problems if you update the value of a field that appears in both of the joined tables.
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.