update: 1 solution

Author: hijiangtao

README.md

@@ -2,14 +2,16 @@
 
 This is the solution collection of my LeetCode problems, most of them are programmed in JavaScript.
 
-Progress: 7/
+Progress: 9/
 
 | ID | Title | Solution | Difficulty |
 |---| ----- | -------- | ---------- |
 |1|[Two Sum](https://leetcode.com/problems/two-sum/) | [JavaScript](./src/two-sum/res.js)|Easy|
 |2|[Add Two Numbers](https://leetcode.com/problems/add-two-numbers/) | [JavaScript](./src/add-two-numbers/res.js)|Medium|
 |175|[Combine Two Tables](https://leetcode.com/problems/combine-two-tables/)| [SQL](./src/combine-two-tables/res.txt)|Easy|
 |176|[Second Highest Salary](https://leetcode.com/problems/second-highest-salary/)| [SQL](./src/second-highest-salary/res.txt)|Easy|
+|177|[Nth Highest Salary](https://leetcode.com/problems/nth-highest-salary/)| [SQL](./src/nth-highest-salary/res.txt)|Medium|
 |181|[Employees Earning More Than Their Managers](https://leetcode.com/problems/employees-earning-more-than-their-managers/) | [SQL](./src/employees-earning-more-than-their-managers/res.txt)|Easy|
 |182|[Duplicate Emails](https://leetcode.com/problems/duplicate-emails/) | [SQL](./src/duplicate-emails/res.txt)|Easy|
+|197|[Rising Temperature](https://leetcode.com/problems/rising-temperature/) | [SQL](./src/rising-temperature/res.txt)|Easy|
 |434|[Number of Segments in a String](https://leetcode.com/problems/number-of-segments-in-a-string/) | [JavaScript](./src/number-of-segments-in-a-string/res.js)|Easy|

src/nth-highest-salary/res.txt

@@ -0,0 +1,20 @@
+-- Write a SQL query to get the nth highest salary from the Employee table.
+
+-- +----+--------+
+-- | Id | Salary |
+-- +----+--------+
+-- | 1  | 100    |
+-- | 2  | 200    |
+-- | 3  | 300    |
+-- +----+--------+
+-- For example, given the above Employee table, the nth highest salary where n = 2 is 200. If there is no nth highest salary, then the query should return null.
+
+CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
+BEGIN
+  DECLARE M INT;
+  SET M=N-1;
+  RETURN (
+      # Write your MySQL query statement below.
+      SELECT DISTINCT Salary FROM Employee ORDER BY Salary DESC LIMIT M,1
+  );
+END

src/rising-temperature/res.txt

@@ -0,0 +1,20 @@
+-- Given a Weather table, write a SQL query to find all dates' Ids with higher temperature compared to its previous (yesterday's) dates.
+
+-- +---------+------------+------------------+
+-- | Id(INT) | Date(DATE) | Temperature(INT) |
+-- +---------+------------+------------------+
+-- |       1 | 2015-01-01 |               10 |
+-- |       2 | 2015-01-02 |               25 |
+-- |       3 | 2015-01-03 |               20 |
+-- |       4 | 2015-01-04 |               30 |
+-- +---------+------------+------------------+
+-- For example, return the following Ids for the above Weather table:
+-- +----+
+-- | Id |
+-- +----+
+-- |  2 |
+-- |  4 |
+-- +----+
+
+# Write your MySQL query statement below
+SELECT a.Id AS 'Id' FROM Weather a INNER JOIN Weather b ON a.Temperature > b.Temperature AND DATEDIFF(a.Date, b.Date)=1