CREATE TABLE "world" (
  "rank" real,
  "city_1" text,
  "city_2" text,
  "2012_passengers_in_millions" text,
  "2011_passengers_in_millions" text,
  "distance" text
);

Question: How many passengers (in millions) flew from Seoul in 2012?
SQL: SELECT "2012_passengers_in_millions" FROM "world" WHERE "city_1"='Seoul';

Question: What the is the first city listed on the route that had 6.6+ passengers in 2011 and a distance of 1075km?
SQL: SELECT "city_1" FROM "world" WHERE "2011_passengers_in_millions"='6.6+' AND "distance"='1075km';

Question: How many passengers (in millions) flew through along the route that is 1075km long in 2012?
SQL: SELECT "2012_passengers_in_millions" FROM "world" WHERE "distance"='1075km';

Question: How many passengers (in millions) in 2011 flew through along the route that had 6.640 million passengers in 2012?
SQL: SELECT "2011_passengers_in_millions" FROM "world" WHERE "2012_passengers_in_millions"='6.640';

Question: Which city is listed first when Okinawa is listed as the second city?
SQL: SELECT "city_1" FROM "world" WHERE "city_2"='Okinawa';

Question: In 2011, which city is listed first along the route that had 7.6+ million passengers?
SQL: SELECT "city_1" FROM "world" WHERE "2011_passengers_in_millions"='7.6+';