Question : UPDATE: Full table schema and data: https://www.db-fiddle.com/f/jT3Mfwd1BJ8GrsBxxPDC8M/1 Table structure (some fields are hidden): +———+———+————+————-+——-+——-+ | user_id | kind_id […]

Question : We have a server which hosts about 10 customers in a multi-tenant web application, each customer has its […]