This Leetcode problem Customers Who Bought All Products LeetCode Solution is done in SQL.
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Customers Who Bought All Products LeetCode Solution
Table of Contents
Problem Statement
| Column Name | Type |
| customer_id | int |
| product_key | int |
CustomerThis 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 |
Productproduct_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.
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
);Code language: SQL (Structured Query Language) (sql)