Context: CREATE TABLE airports (name VARCHAR, city VARCHAR, apid VARCHAR); CREATE TABLE routes (src_apid VARCHAR)
Question: Find the name and city of the airport which is the source for the most number of flight routes.
Answer: SELECT T1.name, T1.city, T2.src_apid FROM airports AS T1 JOIN routes AS T2 ON T1.apid = T2.src_apid GROUP BY T2.src_apid ORDER BY COUNT(*) DESC LIMIT 1