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Author: ggeerraarrdd

README.md

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 [![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-197-green.svg)](#index)
+[![Solved](https://img.shields.io/badge/solved-198-green.svg)](#index)
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 # SQL Everyday
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 | 195   | [Game Play Analysis III](https://leetcode.com/problems/game-play-analysis-iii/description/)                                                                       | [Solution](solutions/195_game_play_analysis_iii.md)                                     | LeetCode    | Medium       |                                                                     |
 | 196   | [Winning Candidate](https://leetcode.com/problems/winning-candidate/description/)                                                                                 | [Solution](solutions/196_winning_candidate.md)                                          | LeetCode    | Medium       |                                                                     |
 | 197   | [Get Highest Answer Rate Question](https://leetcode.com/problems/get-highest-answer-rate-question/)                                                               | [Solution](solutions/197_get_highest_answer_rate_question.md)                           | LeetCode    | Medium       |                                                                     |
+| 198   | [Count Student Number in Departments](https://leetcode.com/problems/count-student-number-in-departments/description/)                                             | [Solution](solutions/198_count_student_number_in_departments.md)                        | LeetCode    | Medium       |                                                                     |
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solutions/198_count_student_number_in_departments.md

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+# SQL Everyday \#198
+
+## Count Student Number in Departments
+
+Site: LeetCode\
+Difficulty per Site: Medium
+
+## Problem
+
+Write a solution to report the respective department name and number of students majoring in each department for all departments in the `Department` table (even ones with no current students).
+
+Return the result table ordered by `student_number` **in descending order**. In case of a tie, order them by `dept_name` **alphabetically**. [[Full Description](https://leetcode.com/problems/count-student-number-in-departments/description/)]
+
+## Submitted Solution
+
+```sql
+-- Submitted Solution
+WITH cte AS (
+    SELECT
+        d.dept_name
+        ,COUNT(DISTINCT student_id) AS student_number
+    FROM Student AS s
+    JOIN Department AS d ON s.dept_id = d.dept_id
+    GROUP BY d.dept_name
+)
+SELECT
+    d.dept_name
+    ,COALESCE(student_number, 0) AS student_number
+FROM Department AS d
+LEFT JOIN cte AS c ON d.dept_name = c.dept_name
+ORDER BY student_number DESC, d.dept_name ASC
+;
+```
+
+## Site Solution
+
+```sql
+-- LeetCode Solution 
+SELECT
+    dept_name, COUNT(student_id) AS student_number
+FROM
+    department
+        LEFT OUTER JOIN
+    student ON department.dept_id = student.dept_id
+GROUP BY department.dept_name
+ORDER BY student_number DESC , department.dept_name
+;
+```
+
+## Notes
+
+TBD
+
+## NB
+
+TBD
+
+Go to [Index](../?tab=readme-ov-file#index)\
+Go to [Overview](../?tab=readme-ov-file)