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create table hotels (id int primary key, name varchar(30) not null);
insert into hotels (id, name) values (1, 'Hotel A');
create table hotel_rooms ( id int primary key, hotel_id int not null, room_type varchar(3) not null);
insert into hotel_rooms (id, hotel_id, room_type) values (1, 1, 'dbl'), (2, 1, 'dbl'), (3, 1, 'sng'), (4, 1, 'trp');
create table hotel_room_usages ( id int primary key auto_increment, room_id int not null, `usage` char(1) not null );
insert into hotel_room_usages (room_id, `usage`) values (1, 'A'), (1, 'E'), (2, 'D'), (2, 'E'), (3, 'A'), (3, 'D'), (3, 'F'), (4, 'A'), (4, 'D'), (4, 'F');
SELECT h.name AS hotel_name , q.* FROM ( SELECT r.hotel_id , COUNT(DISTINCT CASE WHEN ruA.room_id IS NOT NULL AND ruD.room_id IS NULL THEN ruA.room_id END) AS TotalRoomsOnlyA , COUNT(DISTINCT CASE WHEN ruD.room_id IS NOT NULL AND ruA.room_id IS NULL THEN ruD.room_id END) AS TotalRoomsOnlyD , COUNT(DISTINCT CASE WHEN ruA.room_id IS NOT NULL AND ruD.room_id IS NOT NULL THEN r.id END) AS TotalRoomsAandD , COUNT(DISTINCT r.id) AS TotalRoomsAorD FROM hotel_rooms AS r LEFT JOIN hotel_room_usages AS ruA ON (ruA.room_id = r.id AND ruA.usage = 'A') LEFT JOIN hotel_room_usages AS ruD ON (ruD.room_id = r.id AND ruD.usage = 'D') WHERE (ruA.room_id IS NOT NULL OR ruD.room_id IS NOT NULL) GROUP BY r.hotel_id ) q JOIN hotels AS h ON (h.id = q.hotel_id) CROSS JOIN (SELECT 2 AS a, 3 AS d) AS n WHERE TotalRoomsAorD >= (a+d) AND ( ((TotalRoomsOnlyA + TotalRoomsAandD) >= a AND TotalRoomsOnlyD >= d) OR (TotalRoomsOnlyA >= d AND (TotalRoomsOnlyD + TotalRoomsAandD) >= d) OR ((TotalRoomsOnlyA + TotalRoomsAandD/2) >= a AND (TotalRoomsOnlyD + TotalRoomsAandD/2) >= d) ) ORDER BY h.name;