更新列细胞％

我有4个百万行我的表中有一个空白栏要求取消预订分为3个年份2010，2011和2012年更新列细胞％

Booking_Skey BookingNumber ArrivalDate DepartureDate BookingDate CancelledDate BookingValue PitchType_Skey Site_Skey 
     124532 B00124532  2010-12-31 2011-01-02 2010-12-31   NULL  10.00    7   2

我需要做的是建立一个什么代码，我可以改变取消指令的％，为一年，我想更新：

所以2010年我必须满足下列条件

--Cancelled Bookings--

在2010年取消总预订的8％，取消日期可以等于或少于抵达日期并等于或大于预订日期
8％的20％取消同一天，到达日期
20％的到达日期之前取消了一天
20％的到达日期
的取消的其余部分是前7天内取消随机在1至90天之间

。

USE Occupancy 
SELECT ArrivalDate, 
DATEADD(day, 
CASE WHEN Rand(CHECKSUM(NEWID())) BETWEEN 0 and 0.92 THEN NULL ELSE 
CASE WHEN Rand(CHECKSUM(NEWID())) BETWEEN 0.92 and 0.94 THEN 0 ELSE 
CASE WHEN Rand(CHECKSUM(NEWID())) BETWEEN 0.94 and 0.96 THEN -1 ELSE 
CASE WHEN Rand(CHECKSUM(NEWID())) BETWEEN 0.96 and 0.98 THEN -7 ELSE 
Round(Rand(CHECKSUM(NEWID())) * -90,0) END END END END, ArrivalDate) AS DaystoReduce 
FROM Bookings 
WHERE DATEPART(Year,ArrivalDate) = '2010' and CancelledDate BETWEEN ArrivalDate AND DepartureDate

你能帮忙吗？

感谢

韦恩

来源

2013-02-21 wafw1971

这是一个单关闭活动支持测试或类似？ – chrisb 2013-02-21 16:47:42

嗨克里斯，是的。 – wafw1971 2013-02-21 16:51:19

如何像下面这样？它不是很漂亮所以会留下，作为一个练习吧，但基本上它沿着计算每种类型的数量，然后将规则应用于对行号的行...

declare @shareCancelled float, @shareSameDay float, @sharePrevDay float, @shareSevenDays float 
select @shareCancelled = 0.08, @shareSameDay = 0.20, @sharePrevDay = 0.20, @shareSevenDays = 0.20 

declare @count int, @cancelled int, @sameDay int, @prevDay int, @sevenDays int 
select @count = COUNT(*) from Bookings WHERE DATEPART(Year,ArrivalDate) = '2010' and CancelledDate BETWEEN ArrivalDate AND DepartureDate 
select @cancelled = @count * @shareCancelled, 
     @sameDay = @count * @shareCancelled * @shareSameDay, 
     @prevDay = @count * @shareCancelled * @sharePrevDay, 
     @sevenDays = @count * @shareCancelled * @shareSevenDays 

select ArrivalDate, 
DATEADD(day, 
CASE WHEN a.RowNum <= @sameDay THEN 0 
    WHEN a.RowNum <= @sameDay + @prevDay THEN -1 
    WHEN a.RowNum <= @sameDay + @prevDay + @sevenDays THEN -7 
    WHEN a.RowNum <= @cancelled THEN -(ABS(CAST(NEWID() AS binary(6)) %90) + 1) 
    ELSE NULL END 
, GETDATE()) as DaystoReduce 
from (
    select *, ROW_NUMBER() OVER(ORDER BY NEWID()) as RowNum from Bookings WHERE DATEPART(Year,ArrivalDate) = '2010' and CancelledDate BETWEEN ArrivalDate AND DepartureDate 
) as a

来源

2013-02-21 17:40:10 chrisb

更新列细胞％

回答

相关问题