Ultimate Simple Solution || Beats 95% || GROUP BY HAVING
Code\n\n# Write your MySQL query statement below\nSELECT \ncustomer_id\nFROM Customer\nGROUP BY customer_id\nHAVING COUNT(DISTINCT product_key) = (SELECT COUNT(
# Code\n```\n# Write your MySQL query statement below\nSELECT \ncustomer_id\nFROM Customer\nGROUP BY customer_id\nHAVING COUNT(DISTINCT product_key) = (SELECT COUNT(*) FROM Product)\n```
['MySQL']