Question: What kind of decor has the least number of reservations?
Schema: create table reservations (room varchar, PRIMARY KEY (room)); create table rooms (decor varchar, roomid varchar, PRIMARY KEY (decor))
SQL: 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