SELECT * FROM tour LEFT JOIN boat on tour.boatID = boat.boatID LEFT JOIN boat_ru ON boat_ru.boatID = boat.boatID LEFT JOIN country on tour.countryID = country.countryID LEFT JOIN country_ru ON country_ru.countryID = country.countryID LEFT JOIN itinerary on tour.itineraryID = itinerary.itineraryID LEFT JOIN itinerary_ru ON itinerary_ru.itineraryID = itinerary.itineraryID WHERE tour.tourID = images;

Неправильный запрос