CREATE TABLE flight (flno DECIMAL, origin TEXT, destination TEXT, distance DECIMAL, departure_date TIME, arrival_date TIME, price DECIMAL, aid DECIMAL)
CREATE TABLE certificate (eid DECIMAL, aid DECIMAL)
CREATE TABLE aircraft (aid DECIMAL, name TEXT, distance DECIMAL)
CREATE TABLE employee (eid DECIMAL, name TEXT, salary DECIMAL)

Show origins of all flights with destination Honolulu.
SELECT origin FROM flight WHERE destination = "Honolulu"
SELECT "origin" FROM "flight" WHERE "Honolulu" = "destination"