Ivanbyone · Ivanbyone · Jul 19, 2025 · Jul 19, 2025
diff --git a/README.md b/README.md
@@ -153,6 +153,7 @@ Useful for preparing for technical interviews and improving your SQL skills.
     - [1978. Employees Whose Manager Left the Company](./leetcode/easy/1978.%20Employees%20Whose%20Manager%20Left%20the%20Company.sql)
     - [2356. Number of Unique Subjects Taught by Each Teacher](./leetcode/easy/2356.%20Number%20of%20Unique%20Subjects%20Taught%20by%20Each%20Teacher.sql)
     - [3436. Find Valid Emails](./leetcode/easy/3436.%20Find%20Valid%20Emails.sql)
+    - [3465. Find Products with Valid Serial Numbers](./leetcode/easy/3465.%20Find%20Products%20with%20Valid%20Serial%20Numbers.sql)
 2. [Medium](./leetcode/medium/)
     - [176. Second Highest Salary](./leetcode/medium/176.%20Second%20Highest%20Salary.sql)
     - [180. Consecutive Numbers](./leetcode/medium/180.%20Consecutive%20Numbers.sql)

diff --git a/leetcode/easy/3465. Find Products with Valid Serial Numbers.sql b/leetcode/easy/3465. Find Products with Valid Serial Numbers.sql
@@ -0,0 +1,31 @@
+/*
+Question 3465. Find Products with Valid Serial Numbers
+Link: https://leetcode.com/problems/find-products-with-valid-serial-numbers/description/?envType=problem-list-v2&envId=database
+
+Table: products
+
++--------------+------------+
+| Column Name  | Type       |
++--------------+------------+
+| product_id   | int        |
+| product_name | varchar    |
+| description  | varchar    |
++--------------+------------+
+(product_id) is the unique key for this table.
+Each row in the table represents a product with its unique ID, name, and description.
+Write a solution to find all products whose description contains a valid serial number pattern. A valid serial number follows these rules:
+
+It starts with the letters SN (case-sensitive).
+Followed by exactly 4 digits.
+It must have a hyphen (-) followed by exactly 4 digits.
+The serial number must be within the description (it may not necessarily start at the beginning).
+Return the result table ordered by product_id in ascending order.
+*/
+
+SELECT 
+    product_id,
+    product_name,
+    description --noqa
+FROM products
+WHERE description ~ '\ySN[0-9]{4}\-[0-9]{4}\y'
+ORDER BY product_id ASC