CREATE TABLE discount_coupons (coupon_id VARCHAR(255), coupon_amount VARCHAR(255)); CREATE TABLE customers (good_or_bad_customer VARCHAR(255), coupon_id VARCHAR(255))
Are the customers holding coupons with amount 500 bad or good?
    
SQL: SELECT T1.good_or_bad_customer FROM customers AS T1 JOIN discount_coupons AS T2 ON T1.coupon_id = T2.coupon_id WHERE T2.coupon_amount = 500