m0_67308643的博客

ROUND(min_amount + (RAND() * (max_amount - min_amount)) + IFNULL(coupon_amount, 0), 2), -- 计算original_total_amount。IF(RAND() < 0.1, DATE_ADD(now, INTERVAL FLOOR(-30 + (RAND() * 60)) DAY), NULL), -- 有10%的概率为非空cancel_time。