Using 'where' in database update
I am trying to use an Appery database, I have no problem creating a record (adding a row) or reading from the database but can't work out how to update. I have a local storage variable with a GUID and I want to update the record that has that GUID. So in SQL it would be something like
"UPDATE users SET person_name = 'smith' WHERE person_GUID = 'xxxxx' "
I have looked at the tutorials etc and cannot figure out how to do this.