Malcolm: SQL for the command line: "show"

SQL extensions are an even more classic example. Look at MODEL, for
instance. In case the relational model is 'too hard', now you can turn
your DB into a tiny spreadsheet and bash at it in the query. How
relational...

(actually it *is* useful, but that doesn't mean it's not totally bizarre
and screwy. The real problem here is SQL's halfassed incapable
implementation of half the relational calculus in a non-Turing-complete
fashion. But it paid for my house so I can't complain *too* terribly
hard.)