Upload 117

Author: ggeerraarrdd

README.md

@@ -145,6 +145,7 @@ To make the daily tasks of creating a new file and updating the index easier, th
 | 114   | [Monthly Transactions I](https://leetcode.com/problems/monthly-transactions-i/description/)                                                                   | [Solution](solutions/114_monthly_transactions_i.md)                                   | LeetCode    | Medium       |   |
 | 115   | [Immediate Food Delivery II](https://leetcode.com/problems/immediate-food-delivery-ii/description/)                                                           | [Solution](solutions/115_immediate_food_delivery_ii.md)                               | LeetCode    | Medium       |   |
 | 116   | [Game Play Analysis IV](https://leetcode.com/problems/game-play-analysis-iv/description/)                                                                     | [Solution](solutions/116_game_play_analysis_iv.md)                                    | LeetCode    | Medium       |   |
+| 117   | [Number of Unique Subjects Taught by Each Teacher](https://leetcode.com/problems/number-of-unique-subjects-taught-by-each-teacher/description/)               | [Solution](solutions/117_number_of_unique_subjects_taught_by_each_teacher.md)         | LeetCode    | Easy         |   |
 
 ## Author(s)
 

solutions/117_number_of_unique_subjects_taught_by_each_teacher.md

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+# SQL Everyday \#117
+
+## Number of Unique Subjects Taught by Each Teacher
+
+Site: LeetCode\
+Difficulty per Site: Easy
+
+## Problem
+
+Write a solution to calculate the number of unique subjects each teacher teaches in the university.
+
+Return the result table in *any order*. [[Full Description](https://leetcode.com/problems/number-of-unique-subjects-taught-by-each-teacher/description/)]
+
+## Submitted Solution
+
+```sql
+-- Submitted Solution
+SELECT
+    teacher_id
+    ,COUNT(DISTINCT subject_id) AS cnt
+FROM Teacher
+GROUP BY teacher_id
+;
+```
+
+## Site Solution
+
+```sql
+-- LeetCode Solution 
+-- Site solution essentially the same.
+```
+
+## Notes
+
+TODO
+
+Go to [Table of Contents](/README.md#contents)\
+Go to [Overview](/README.md)