Database: customer_complaints

Question: Find the number of complaints with Product Failure type for each complaint status.
SQL: SELECT complaint_status_code ,  count(*) FROM complaints WHERE complaint_type_code  =  "Product Failure" GROUP BY complaint_status_code

Question: What are the first names of the top 5 staff who have handled the greatest number of complaints?
SQL: SELECT t1.first_name FROM staff AS t1 JOIN complaints AS t2 ON t1.staff_id  =  t2.staff_id GROUP BY t2.staff_id ORDER BY count(*) LIMIT 5