SQL语句中的子查询应用

某公司的面试考核题:

销售信息表 tbSaleInfo


   DeviceNo        设备编号
   GoodNo          货道编号(1-24)
   CardNo          卡号
   Money           消费金额
   Balance         卡片余额   
   SaleFlowNo      售卖流水号
   SaleTime        售卖时间
   CollectionTime  采集时间
   Mode        销售类型
               Mode = 0  表示现金消费,此时卡号=0,卡片余额=0
               Mode = 4  表示持卡消费,此时卡号有效,卡片余额有效

要求:

按设备编号查询:设备编号、开始日期 - 截止日期
输出信息字段:设备编号、销售日期、现金销售数量、现金销售金额、IC卡销售数量、IC卡销售金额、总销售数量、总销售金额
现金:销售日志 Mode = 0
IC卡:销售日志 Mode = 4
指定日期范围内每天一条销售信息,按照日期排序

我的方法:

@DeviceNo @SaleTime @SaleTime2  本别对应三个参数:设备编号、开始日期 - 截止日期。
代码
SELECT
@DeviceNo AS 设备编号,
CONVERT(varchar(10), SaleTime, 120) AS 销售日期,

(
SELECT COUNT(Id) AS Expr1
FROM tbSaleInfo AS tbSaleInfo_1
WHERE (DeviceNo = @DeviceNo) AND (Mode = 0) AND (CONVERT(varchar(10), SaleTime, 120) = CONVERT(varchar(10), tbSaleInfo.SaleTime, 120))
GROUP BY CONVERT(varchar(10), SaleTime, 120))
AS 现金销售数量,

(
SELECT SUM([Money]) AS Expr1
FROM tbSaleInfo AS tbSaleInfo_1
WHERE (DeviceNo = @DeviceNo) AND (Mode = 0) AND (CONVERT(varchar(10), SaleTime, 120) = CONVERT(varchar(10), tbSaleInfo.SaleTime, 120))
GROUP BY CONVERT(varchar(10), SaleTime, 120))
AS 现金销售金额,

(
SELECT COUNT(Id) AS Expr1
FROM tbSaleInfo AS tbSaleInfo_1
WHERE (DeviceNo = @DeviceNo) AND (Mode = 4) AND (CONVERT(varchar(10), SaleTime, 120) = CONVERT(varchar(10), tbSaleInfo.SaleTime, 120))
GROUP BY CONVERT(varchar(10), SaleTime, 120))
AS IC卡销售数量,

(
SELECT SUM([Money]) AS Expr1
FROM tbSaleInfo AS tbSaleInfo_1
WHERE (DeviceNo = @DeviceNo) AND (Mode = 4) AND (CONVERT(varchar(10), SaleTime, 120) = CONVERT(varchar(10), tbSaleInfo.SaleTime, 120))
GROUP BY CONVERT(varchar(10), SaleTime, 120))
AS IC卡销售金额,

COUNT(Id) AS 总销售数量,

SUM([Money]) AS 总销售金额
FROM tbSaleInfo
WHERE (DeviceNo = @DeviceNo) AND (SaleTime BETWEEN @SaleTime AND @SaleTime2)
GROUP BY CONVERT(varchar(10), SaleTime, 120)
ORDER BY 销售日期

我想到的貌似只有子查询了,前辈们多多指教!

posted on 2010-01-25 15:26  eshizhan  阅读(791)  评论(0编辑  收藏  举报