Natural Language Solution
Approach\nwe have to chose those customer_id which have same number of product key as total number of product(using sub_query from Product table)\n\n\n# Code\n\
# Approach\nwe have to chose those customer_id which have same number of product key as total number of product(using sub_query from Product table)\n\n\n# Code\n```\n# Write your MySQL query statement below\n\nselect customer_id \nfrom Customer \ngroup by customer_id\nhaving count(distinct (product_key))=(select count(product_key) from Product )\n\n```\n![Screenshot 2023-12-03 042253.png](https://assets.leetcode.com/users/images/c2ee8042-2ef2-46ee-a7c7-8276bd8ab190_1705015649.8040946.png)\n
['MySQL']