[wfriesen]

In Oracle this is kind of hidden away since it is case sensitive, but unquoted identifiers are silently converted to uppercase, quoted identifiers are used as-is. So, for queries against something like

  create table foo (
    Bar integer,
    "Foobar" integer
  );

Referring to Bar, BAR, bar, and "Foobar" will work, but foobar and Foobar will not.