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create table customers (phone varchar(20), city varchar(50)); insert into customers values ('1234', 'Chicago'), ('2345', 'New York'), ('1234', 'Toronto'); create table cities (city varchar(50), country varchar(50)); insert into cities values ('Chicago', 'USA' ), ('New York', 'USA' ), ('Las Vegas', 'USA' ), ('Toronto', 'Canada' ), ('Montreal', 'Canada');
select c.phone, c.city from customers c where c.phone='1234' order by case when exists ( select * from cities ct where ct.city='new york' and ct.country=(select country from cities x where x.city=c.city) ) then 1 else 0 end desc limit 1
phone
city
1234
Chicago