Upload 140

Author: ggeerraarrdd

README.md

@@ -172,6 +172,7 @@ The problems and both submitted and site solutions are documented in individual
 | 137   | [Fix Names in a Table](https://leetcode.com/problems/fix-names-in-a-table/description/)                                                                       | [Solution](solutions/137_fix_names_in_a_table.md)                                     | LeetCode    | Easy         | `SUBSTRING()`                                                       |
 | 138   | [Patients With a Condition](https://leetcode.com/problems/patients-with-a-condition/description/)                                                             | [Solution](solutions/138_patients_with_a_condition.md)                                | LeetCode    | Easy         |                                                                     |
 | 139   | [Second Highest Salary](https://leetcode.com/problems/second-highest-salary/description/)                                                                     | [Solution](solutions/139_second_highest_salary.md)                                    | LeetCode    | Medium       |                                                                     |
+| 140   | [Group Sold Products By The Date](https://leetcode.com/problems/group-sold-products-by-the-date/description/)                                                 | [Solution](solutions/140_group_sold_products_by_the_date.md)                          | DataLemur   | Easy         | `GROUP_CONCAT()`                                                    |
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 ## Author(s)

solutions/140_group_sold_products_by_the_date.md

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+# SQL Everyday \#140
+
+## Group Sold Products By The Date
+
+Site: DataLemur\
+Difficulty per Site: Easy
+
+## Problem
+
+Write a solution to find for each date the number of different products sold and their names.
+
+The sold products names for each date should be sorted lexicographically.
+
+Return the result table ordered by `sell_date`. [[Full Description](https://leetcode.com/problems/group-sold-products-by-the-date/description/)]
+
+## Submitted Solution
+
+```sql
+-- Submitted Solution
+SELECT
+    sell_date
+    ,COUNT(DISTINCT product) AS num_sold
+    ,GROUP_CONCAT(DISTINCT product ORDER BY product SEPARATOR ",") AS products
+FROM Activities
+GROUP BY sell_date
+ORDER BY sell_date ASC, products ASC
+;
+```
+
+## Site Solution
+
+```sql
+-- DataLemur Solution 
+-- TBD
+```
+
+## Notes
+
+TBD
+
+## NB
+
+`GROUP_CONCAT()`
+
+Go to [Index](../?tab=readme-ov-file#index)\
+Go to [Overview](../?tab=readme-ov-file)