Last updated on August 5th, 2024 at 12:41 am
This Leetcode problem Customers Who Bought All Products LeetCode Solution is done in SQL.
List of all LeetCode Solution
Level of Question
Medium
Customers Who Bought All Products LeetCode Solution
Table of Contents
Problem Statement
Column Name | Type |
customer_id | int |
product_key | int |
Customer
This table may contain duplicates rows. customer_id
is not NULL.
product_key is a foreign key (reference column) to Product
table.
Column Name | Type |
product_key | int |
Product
product_key is the primary key (column with unique values) for this table.
Write a solution to report the customer ids from the Customer
table that bought all the products in the Product
table.
Return the result table in any order.
The result format is in the following example.
Example 1:
Input:
customer_id | product_key |
1 | 5 |
2 | 6 |
3 | 5 |
3 | 6 |
1 | 6 |
product_key |
5 |
6 |
Output:
customer_id |
1 |
3 |
Explanation: The customers who bought all the products (5 and 6) are customers with IDs 1 and 3.
1. Customers Who Bought All Products LeetCode Solution MySQL
select customer_id from Customer group by customer_id having sum(distinct product_key) = ( select sum(product_key) from Product );