https://www.hackerrank.com/challenges/placements/problem?isFullScreen=true
나보다 내 친구 연봉이 높을 때 이름 출력
WITH s_p AS(
SELECT
s.ID,
s.Name,
p.Salary
FROM
Students s
INNER JOIN Packages p
ON s.ID=p.ID
),
f_p AS(
SELECT
f.ID,
f.Friend_ID,
p.Salary
FROM
Friends f
INNER JOIN Packages p
ON f.Friend_ID=p.ID
)
SELECT
s_p.Name
FROM
s_p
INNER JOIN f_p
ON s_p.ID=f_p.ID
WHERE 1=1
AND s_p.Salary<f_p.Salary
ORDER BY
f_p.Salary
아 진짜 쉬운거였는데 작은 실수들로 느리게 풀었다 ;ㅣ;;;