leetcode 177, 178

Author: LjyYano

solution/0100-0199/0177.Nth Highest Salary/Solution.sql

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+CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
+BEGIN
+  set N = N-1;
+  RETURN (
+      # Write your MySQL query statement below.
+      SELECT (SELECT DISTINCT Salary FROM Employee ORDER BY Salary DESC LIMIT 1 OFFSET N) AS SecondHighestSalary
+  );
+END

solution/0100-0199/0178.Rank Scores/Solution.sql

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+select
+    Score,
+    (select count(*) from (select distinct Score s from Scores) tmp where s>=Score) Rank
+from Scores order by Rank;