数据库SQL查询语句实验报告(12)

SELECT a.CustomerNo ,CustomerName , FROM Customer a WHERE NOT EXISTS ( SELECT * FROM OrderMaster b,OrderDetail c WHERE a.CustomerNo =b.CustomerNo and b.orderNo =c.orderNo ) GROUP BY a.CustomerNo ,CustomerName 结果：

(4) 找出至少被订购3次的商品编号、订单编号、订货数量和订货金额，并按订货数量的降序排序输出。 命令：

SELECT productNo ,orderNo ,quantity ,quantity *price 订货金额 FROM OrderDetail

WHERE productNO IN( SELECT productNo FROM OrderDetail GROUP BY productNo HAVING count(*)>=3) ORDER BY productNo desc 结果：