Jak utworzyć wiele wierszy z pierwszego wiersza

Użyj tego dla jednego konkretnego ID

select id, city_name from(
    select id, city_1 as city_name from yourTable    
    union all
    select id, city_2 from yourTable    
    union all
    select id, city_3 from yourTable    
    union all
    select id, city_4 from yourTable
) as t where id= yourID

http://sqlfiddle.com/#!9/7ee1f/1

Użyj tego dla całego stołu

 select id, city_name from(
    select id, city_1 as city_name from yourTable    
    union all
    select id, city_2 from yourTable    
    union all
    select id, city_3 from yourTable    
    union all
    select id, city_4 from yourTable
) as t
order by id