Hi,
Here is my schema:
cruise_line -> ship(id_line) -> cruise_type(id_ship) -> cruise(id_cruise_type)
-> price(id_cruise, id_currency) <- currency (USD,GBP,EUR,CAD)
(a 'cruise' is a 'cruise_type' + a date)
I am trying to display a count of cruise's for each ship and each
currency even if that count is 0.
But I am having trouble building the query, as some 'cruise's might not
(yet) have a 'price' in all currencies and so no link to 'currency'.
Thanks,