单参数 SQL Server 存储过程的同时结果

Question

我有以下 t-sql：

declare @startdate datetime, @finishdate datetime;
declare @declinerate float, @setpoint float;
declare @recoveredmw;

set @startdate = '2016-01-01';
set @finishdate = '2016-12-31'
set @declinerate = 0.0972 / 100;
set @setpoint = 98;
set @recoveredmw = @setpoint - 1;

;WITH ctetest AS 
(
    SELECT      
        @StartDate AS CDate, 
        @setpoint as Case2, 
        0 as OLNo

    UNION ALL

    SELECT      
        dateadd(day,1,CDate),
        CASE 
           WHEN Case2 < @recoveredMW THEN @setpoint 
                                     ELSE (1 - @declinerate1) * Case2 
        END,
        OLNo + (CASE WHEN Case2 < @recoveredMW THEN 1 ELSE 0 END)
    FROM        
        ctetest 
    WHERE       
        dateadd(day, 1, CDate) <= @finishdate
)
SELECT * 
FROM ctetest OPTION (MAXRECURSION 0)

那么结果应该是：

---------------------------------
CDate          Case2       OLNo
---------------------------------
2016-01-01     98          0
2016-01-02     97.9        0
2016-01-03     97.81       0
ff.
2016-12-30     97.62       30
2016-12-31     97.52       30

它根据@startdate 和@finishdate 参数创建从1 月1 日到12 月底的数据。

我想要的是同时创建一个@recoveredMW。假设@setpoint 是 98，那么它将创建上面的结果，即@recoveredMW 是从@setpoint 减去 1。在2016-12-31 之后，它会从头开始创建另一个原始数据，但@recoveredMW 是负2 等等。

结果样本：

---------------------------------
CDate          Case2       OLNo
---------------------------------
2016-01-01     98          0
2016-01-02     97.9        0
2016-01-03     97.81       0
ff.
2016-12-30     97.62       30
2016-12-31     97.52       30
2016-01-01     97          0        <-- New RawData after 2016-12-31, @recoveredMW-2
2016-01-02     96.91       0
2016-01-03     96.81       0
ff.
2016-12-31     96.53       30

有没有办法做到这一点？

谢谢。

Answer 1

在第一个锚成员之后将另一个锚成员添加到您的 ctetest

        SELECT      @startdate AS CDate, 
                    @setpoint - 1 as Case2, 
                    0 as OLNo

如果您希望结果单独排序，请添加另一列以区分 @setpoint 和 @setpoint - 1 的原始运行

这是修改后的查询

;WITH ctetest AS 
        (
            SELECT      1 AS Data,   -- Added
            @startdate AS CDate, 
                        @setpoint as Case2, 
                        0 as OLNo

            UNION ALL

            SELECT      2 as Data,
            @startdate AS CDate, 
                        @setpoint - 1 as Case2, 
                        0 as OLNo

            UNION ALL

            SELECT      Data,
            dateadd(day,1,CDate),
                        CASE WHEN Case2 < @recoveredmw THEN @setpoint ELSE (1 - @declinerate) * Case2 END,
                        OLNo + (CASE WHEN Case2 < @recoveredmw THEN 1 ELSE 0 END)
            FROM        ctetest 
            WHERE       dateadd(day, 1, CDate) <= @finishdate
        )
        SELECT      * 
        FROM        ctetest 
    order by    Data, CDate
    OPTION (MAXRECURSION 0)

编辑 1：

;WITH 
numbers AS          -- added
(
    SELECT  n = 1
    UNION ALL
    SELECT  n = n + 1
    FROM    numbers
    WHERE   n < 999
),
ctetest AS 
        (
            SELECT      n AS Data,                   -- change
            @startdate AS CDate, 
                        CAST (n as FLOAT) as Case2,   -- change
                        0 as OLNo
        FROM        numbers                           -- change
        WHERE   n   <= @setpoint                 -- change

            UNION ALL

            SELECT      Data,
            dateadd(day,1,CDate),
                        CASE WHEN Case2 < @recoveredmw THEN @setpoint ELSE (1 - @declinerate) * Case2 END,
                        OLNo + (CASE WHEN Case2 < @recoveredmw THEN 1 ELSE 0 END)
            FROM        ctetest 
            WHERE       dateadd(day, 1, CDate) <= @finishdate
        )
        SELECT      * 
        FROM        ctetest 
    order by    Data DESC, CDate     -- change
    OPTION (MAXRECURSION 0)