Upload 188

Author: ggeerraarrdd

README.md

@@ -1,6 +1,6 @@
 <!-- markdownlint-disable MD041 -->
 [![eevveerryyddaayy release](https://img.shields.io/badge/eevveerryyddaayy-v1.3.0-blue.svg)](https://github.com/ggeerraarrdd/eevveerryyddaayy/)
-[![Solved](https://img.shields.io/badge/solved-187-green.svg)](#index)
+[![Solved](https://img.shields.io/badge/solved-188-green.svg)](#index)
 <!-- markdownlint-enable MD041 -->
 
 # SQL Everyday
@@ -221,6 +221,7 @@ Because this project necessitated a framework to enable consistent daily practic
 | 185   | [Sales Analysis I](https://leetcode.com/problems/sales-analysis-i/description/)                                                                                   | [Solution](solutions/185_sales_analysis_i.md)                                           | LeetCode    | Easy         |                                                                     |
 | 186   | [Sales Analysis II](https://leetcode.com/problems/sales-analysis-ii/description/)                                                                                 | [Solution](solutions/186_sales_analysis_ii.md)                                          | LeetCode    | Easy         | `STRING_AGG` vs `GROUP_CONCAT`                                      |
 | 187   | [Sales Analysis III](https://leetcode.com/problems/sales-analysis-iii/description/)                                                                               | [Solution](solutions/187_sales_analysis_iii.md)                                         | LeetCode    | Easy         | `HAVING`                                                            |
+| 188   | [The Winner University](https://leetcode.com/problems/the-winner-university/description/)                                                                         | [Solution](solutions/188_the_winner_university.md)                                      | LeetCode    | Easy         |                                                                     |
 <!-- Index End - WARNING: Do not delete or modify this markdown comment. -->
 <!--- cSpell:enable --->
 

solutions/188_the_winner_university.md

@@ -0,0 +1,91 @@
+# SQL Everyday \#188
+
+## The Winner University
+
+Site: LeetCode\
+Difficulty per Site: Easy
+
+## Problem
+
+There is a competition between New York University and California University. The competition is held between the same number of students from both universities. The university that has more **excellent students** wins the competition. If the two universities have the same number of **excellent students**, the competition ends in a draw.
+
+An **excellent student** is a student that scored `90%` or more in the exam.
+
+Return:
+
+* **"New York University"** if New York University wins the competition.
+* **"California University"** if California University wins the competition.
+* **"No Winner"** if the competition ends in a draw. [[Full Description](https://leetcode.com/problems/the-winner-university/description/)]
+
+## Submitted Solution
+
+```sql
+-- Submitted Solution
+WITH cte1 AS (
+    SELECT
+        'New York University' AS university
+        ,COUNT(DISTINCT student_id) AS student_count
+    FROM NewYork
+    WHERE score >= 90
+    GROUP BY university
+    UNION
+    SELECT
+        'California University' AS university
+        ,COUNT(DISTINCT student_id) AS student_count
+    FROM California
+    WHERE score >= 90
+    GROUP BY university
+),
+cte2 AS (
+    SELECT
+        *
+        ,1.0 * student_count / SUM(student_count) OVER () AS percentage
+    FROM cte1
+)
+SELECT
+    CASE WHEN percentage = 0.5 THEN 'No Winner' ELSE university END AS winner
+FROM cte2
+ORDER BY student_count DESC
+LIMIT 1
+;
+```
+
+## Site Solution
+
+```sql
+-- LeetCode Solution 
+SELECT 
+  CASE 
+    WHEN NY.excellent_students > CA.excellent_students THEN 'New York University'
+    WHEN NY.excellent_students < CA.excellent_students THEN 'California University'
+    ELSE 'No Winner'
+  END AS winner
+FROM 
+  (
+    SELECT 
+      COUNT(*) as excellent_students 
+    FROM 
+      NewYork 
+    WHERE 
+      score >= 90
+  ) NY, 
+  (
+    SELECT 
+      COUNT(*) as excellent_students 
+    FROM 
+      California 
+    WHERE 
+      score >= 90
+  ) CA;
+```
+
+## Notes
+
+TBD
+
+## NB
+
+TBD
+
+Go to [Index](../?tab=readme-ov-file#index)\
+Go to [Overview](../?tab=readme-ov-file)