Database: bike_1
Question: What are the ids of stations that had more than 14 bikes available on average or were installed in December?
SQL: select  t1.id from station as t1 join status as t2 on t1.id  =  t2.station_id group by t2.station_id having avg(t2.bikes_available)  >  14 union select id from station where installation_date like "12/%"