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

What kind of decor has the least number of reservations?
SELECT T2.decor FROM reservations AS T1 JOIN rooms AS T2 ON T1.room = T2.roomid GROUP BY T2.decor ORDER BY COUNT(T2.decor) LIMIT 1
SELECT "T2"."decor" FROM "reservations" "T1" JOIN "rooms" "T2" ON "T1"."room" = "T2"."roomid" GROUP BY "T2"."decor" ORDER BY COUNT("T2"."decor") FETCH FIRST 1 ROWS ONLY