SQL派生表/公式

时间:2011-08-09 18:35:33

标签: sql sql-server sql-server-2005 sql-server-2008

SQL 2005:

我正在处理一组生成公式的SQL查询。

这个数学计算,例如:(3000 -30)/ 1477 * 100 = 201.1%必须从一组表中生成。

Value : 3000 is generated from this query ..
select sum(DaysSupply) as [Total Days Supply] from vOeOrderWide where patcustid = 4797 
Output is [Total Days Supply]


Value : 30 is generated from this query ..
select top 1 DaysSupply from VoeOrderwide where patcustid = 4797 order by datefilled desc
Output is [DaysSupply]

Value : 1477 is generated from these set of queries ...

declare @d1  datetime;
declare @d2  datetime;
set @d1= (select top 1 DateFilled from vOeOrderWide where patcustid = 4797 
order by DateFilled asc)
set @d2= (select top 1 DateFilled from vOeOrderWide where patcustid = 4797 order by DateFilled DESC )
select DATEDIFF(d,@d1,@d2) as [Days Between] 

Output is [Days Between]

I want to combine all these queries and generate the formula as ..

[Total Days Supply] - [DaysSupply]  /  [Days Between]  * 100

2 个答案:

答案 0 :(得分:1)

我猜你在找这样的东西?

DECLARE @TotalDaysSupply int, @DaysSupply int

select @TotalDaysSupply = sum(DaysSupply) as [Total Days Supply] from vOeOrderWide where patcustid = 4797 

SET @DaysSupply = (select top 1 DaysSupply from VoeOrderwide where patcustid = 4797 order by datefilled desc)

declare @d1  datetime;
declare @d2  datetime;
DECLARE @DaysBetween int

set @d1= (select top 1 DateFilled from vOeOrderWide where patcustid = 4797 
order by DateFilled asc)
set @d2= (select top 1 DateFilled from vOeOrderWide where patcustid = 4797 order by  DateFilled DESC )

select @DaysBetween = DATEDIFF(d,@d1,@d2)

--[Total Days Supply] - [DaysSupply]  /  [Days Between]  * 100

SELECT  CAST(@TotalDaysSupply AS float) - @DaysSupply/ @DaysBetween * 100 AS Result

答案 1 :(得分:1)

嗯,我想我会在这些方面尝试更多的东西:

WITH supply_data (Total_Days_Supply, Earliest_Date_Filled, Latest_Date_Filled) as (
                  SELECT SUM(DaysSupply), MIN(DateFilled), MAX(DateFilled)
                  FROM voeOrderWide
                  WHERE patCustId = 4797)
SELECT 100.00 * ((Total_Days_Supply - (SELECT TOP 1 DaysSupply
                                       FROM voeOrderWide
                                       WHERE patCustId = 4797
                                       AND DateFilled = LatestDateFilled
                                       ORDER BY DateFilled DESC)) 
                 / DateDiff(d, Earliest_Date_Filled, Latest_Date_Filled))
FROM supply_data

请注意,我没有SQL服务器实例来测试它。