mysql 查询练习——计算总订单价格大于100的订单号和总订单价格

问题：查询总订单价格大于100的订单号和总订单价格，SQL语句如下：

答案：SELECT o_num,  SUM(quantity *item_price) AS orderTotal

FROM orderitems

GROUP BY o_num

HAVING SUM(quantity*item_price) >= 100;