Upload 151

Author: ggeerraarrdd

README.md

@@ -183,6 +183,7 @@ The problems and both submitted and site solutions are documented in individual
 | 148   | [Swap Salary](https://leetcode.com/problems/swap-salary/description/)                                                                                         | [Solution](solutions/148_swap_salary.md)                                              | LeetCode    | Easy         |                                                                     |
 | 149   | [Sales Person](https://leetcode.com/problems/sales-person/description/)                                                                                       | [Solution](solutions/149_sales_person.md)                                             | LeetCode    | Easy         |                                                                     |
 | 150   | [Reformat Department Table](https://leetcode.com/problems/reformat-department-table/description/)                                                             | [Solution](solutions/150_reformat_department_table.md)                                | LeetCode    | Easy         |                                                                     |
+| 151   | [Capital Gain/Loss](https://leetcode.com/problems/capital-gainloss/description/)                                                                              | [Solution](solutions/151_capital_gainloss.md)                                         | LeetCode    | Medium       |                                                                     |
 <!-- Index End - WARNING: Do not delete or modify this markdown comment. -->
 
 ## Author(s)

solutions/151_capital_gainloss.md

@@ -0,0 +1,59 @@
+# SQL Everyday \#151
+
+## Capital Gain/Loss
+
+Site: LeetCode\
+Difficulty per Site: Medium
+
+## Problem
+
+Write a solution to report the *Capital gain/loss* for each stock.
+
+The *Capital gain/loss* of a stock is the total gain or loss after buying and selling the stock one or many times.
+
+Return the result table in *any order*. [[Full Description](https://leetcode.com/problems/capital-gainloss/description/)]
+
+## Submitted Solution
+
+```sql
+-- Submitted Solution
+WITH cte AS (
+    SELECT
+        stock_name
+        ,CASE WHEN operation = 'Buy' THEN -price ELSE price END AS new_price
+    FROM Stocks
+)
+SELECT
+    stock_name
+    ,SUM(new_price) AS capital_gain_loss
+FROM cte
+GROUP BY stock_name
+;
+```
+
+## Site Solution
+
+```sql
+-- LeetCode Solution 
+SELECT 
+    stock_name,
+    SUM(
+        CASE 
+            WHEN operation = 'buy' THEN -price
+            WHEN operation = 'sell' THEN price
+        END
+    ) AS capital_gain_loss
+FROM Stocks
+GROUP BY stock_name
+```
+
+## Notes
+
+TBD
+
+## NB
+
+TBD
+
+Go to [Index](../?tab=readme-ov-file#index)\
+Go to [Overview](../?tab=readme-ov-file)