✅✅✅EASY MYSQL SOLUTION
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n![upv.png](https://assets.leetcode.com/users/images/8d92dfce-67bb-40a5-85e2-34b97efe29d0_1723810500.556567.png)\n\n```\n# Write your MySQL query statement below\nSELECT c.customer_id FROM Customer c GROUP BY c.customer_id HAVING COUNT(DISTINCT c.product_key) = (SELECT COUNT(DISTINCT product_key) FROM Product);\n```
['MySQL']