For each condition, ask: is it about one row, or about a group? A condition on one row goes in WHERE. A condition on an aggregate goes in HAVING.

1. Run the query in the editor and read the error. Fix it: show each country and its number of customers, only where that number is more than 1.
2. Show each department_id and the number of its employees who earn more than 60000. Keep only the departments where that number is 2 or more.
3. Show each customer_id and the number of their orders with the status delivered or shipped. Keep only the customers with 2 or more of those orders. Sort: most orders first, then by customer_id.