Louis-David Mitterrand <vindex+lists-pgsql-...@apartia.org> wrote: > Here is the basic schema:
> -------------------------->id_ship>----------------------- > | | > [SHIP]->id_ship->[CABIN]->id_cabin->[PRICE]<-id_cruise<-[CRUISE] > It's a database of cruise prices. > Each 'price' object has a reference to 'cabin' and 'cruise' > 'cabin' belongs to a 'ship', so does 'cruise' > I'm trying to select all cabins of cruise N°1 with prices OR nothing if > there is no price (meaning cabin not available). I want all cabins > listed, price or no price. > Also when doing the query I don't have the id_ship, only the id_cruise. > What is the best way of doing it? UNION or LEFT JOIN? I tried the latter > without success and am unsure on how do do the former. Was does "without success" mean? The objective seems to be straight-forward: - Select all cabins that belong to the ship that belongs to the cruise id_cruise. - Left join that with the prices of the cruise id_cruise. Tim -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
