CREATE TABLE rooms (roomid TEXT, roomname TEXT, beds DECIMAL, bedtype TEXT, maxoccupancy DECIMAL, baseprice DECIMAL, decor TEXT)
CREATE TABLE reservations (code DECIMAL, room TEXT, checkin TEXT, checkout TEXT, rate DECIMAL, lastname TEXT, firstname TEXT, adults DECIMAL, kids DECIMAL)

Which room has the largest number of reservations?
SELECT T2.roomname FROM reservations AS T1 JOIN rooms AS T2 ON T1.room = T2.roomid GROUP BY T1.room ORDER BY COUNT(*) DESC LIMIT 1
SELECT "T2"."roomname" FROM "reservations" AS "T1" JOIN "rooms" AS "T2" ON "T1"."room" = "T2"."roomid" GROUP BY "T1"."room" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1