SELECT count(*) FROM Student WHERE city_code  =  "HKG" OR city_code  =  "CHI"
Give the number of students living in either HKG or CHI.
SELECT count ( * ) FROM Student WHERE city_code = `` HKG '' OR city_code = `` CHI ''
select count ( * ) from student where city_code = value or city_code = value
Give the number of students living in either HKG or CHI .