beginners querying question

Hi folks,

I'm just trying to understand bout RDB and i seem to have a serious problem bout one task in my book...
ive got a table with several pricings of articles and an article number.

now find the pricing of the cheapest article seems pretty simple:

grp[|min ::= MIN(pricing)](Articles)

but how to get the number?

i found this one:

grp[|pricing ::= MIN(pricing)](Articles) join[pricing](Articles)

is this possible? or reasonable? isnt there another... you know, a cuter way to do that? if this would work, it would seem to me like the dirtiest hack on world =)

regards,

nick

-- 
Man is the only animal that can remain on friendly terms with the
victims he intends to eat until he eats them.
                -- Samuel Butler (1835-1902)