목록LeetCode/SQL (3)

조컴퓨터

leetcode 197. Rising Temperature

1) SELF JOIN 1-1) SELECT * FROM Weather w1, Weather w2 WHERE DATE_ADD(w1.recordDate, INTERVAL 1 DAY) = w2.recordDate AND w1.Temperature < w2.Temperature 1-1) 결과 {"headers": ["Id", "RecordDate", "Temperature", "Id", "RecordDate", "Temperature"], "values": [[1, "2015-01-01", 10, 2, "2015-01-02", 25], [3, "2015-01-03", 20, 4, "2015-01-04", 30]]} 2) w2.Id 2-1) SELECT w2.Id AS Id FROM Weather w1, Wea..
LeetCode/SQL 2021. 1. 18. 20:02
leetcode 181. Employees Earning More Than Their Managers

1) SELF JOIN 1-1) SELECT * FROM Employee e1, Employee e2 WHERE e1.Id = e2.ManagerId 1-1) 결과 {"headers": ["Id", "Name", "Salary", "ManagerId", "Id", "Name", "Salary", "ManagerId"], "values": [[3, "Sam", 60000, null, 1, "Joe", 70000, 3], [4, "Max", 90000, null, 2, "Henry", 80000, 4]]} 2) e1.Salary(매니저 급여) < e2.Salary(직원 급여) SELECT * FROM Employee e1, Employee e2 WHERE e1.Id = e2.ManagerId AND e1.S..
LeetCode/SQL 2021. 1. 18. 18:25
leetcode 1179. Reformat Department Table

1) CASE WHEN 1-1) SELECT id , CASE WHEN month = "Jan" THEN revenue ELSE NULL END AS Jan_Revenue , CASE WHEN month = "Feb" THEN revenue ELSE NULL END AS Feb_Revenue , CASE WHEN month = "Mar" THEN revenue ELSE NULL END AS Mar_Revenue , CASE WHEN month = "Apr" THEN revenue ELSE NULL END AS Apr_Revenue , CASE WHEN month = "May" THEN revenue ELSE NULL END AS May_Revenue , CASE WHEN month = "Jun" THEN..
LeetCode/SQL 2021. 1. 18. 14:40
이전 Prev 1 Next 다음