TSQL

Question

我有一个数据仓库的 beginnngs，其中包含（除其他 tables）

date table 有 200 年的日期可以加入，所以不需要建立一个“动态”日期 table
dbo.Dim_Items（见下文）

ItemNumber	QOH	EffectiveDate	ExpirationDate	IsCurrentRecord
372620	24	2021-12-11 05:34:09.000	9999-12-31 00:00:00.000	1
372620	11	2021-12-09 05:34:11.000	2021-12-11 05:34:09.000	0
372620	9	2021-12-07 05:34:20.000	2021-12-09 05:34:11.000	0

我想找出从 2021 年 12 月 7 日到今天（为简洁起见，假设 2021 年 12 月 13 日）之间每一天的 QOH，这样我的结果如下所示

Date	ItemNumber	QOH
2021-12-07	372620	9
2021-12-08	372620	9
2021-12-09	372620	11
2021-12-10	372620	11
2021-12-11	372620	24
2021-12-12	372620	24
2021-12-13	372620	24

我最接近的是下面的查询，但它没有按照我想要的方式工作（注意日期上的零与 Items 维度不一致）

DECLARE @START_DATE date,
        @END_DATE date

SET @START_DATE = '20211207'
SET @END_DATE = GETDATE()   -- '20211213'

SELECT CAL.TheDate,
        I.ItemNumber,
        I.QOH
FROM dbo.Dim_Calendar CAL
    LEFT OUTER JOIN dbo.Dim_Items I ON CAL.TheDate >= CAST(I.EffectiveDate as date)
        AND CAL.TheDate <= CAST(I.EffectiveDate as date)
        AND I.ItemNumber = 372620
WHERE CAL.TheDate >= @START_DATE
    AND CAL.TheDate <= @END_DATE
ORDER BY CAL.TheDate,
            I.ItemNumber

Date	ItemNumber	QOH
2021-12-07	372620	9
2021-12-08	372620	0
2021-12-09	372620	11
2021-12-10	372620	0
2021-12-11	372620	24
2021-12-12	372620	0
2021-12-13	372620	0

我是整个数据仓库的新手，所以我不确定如何正确构建此查询。

Answer 1

DBFIDDLE

DECLARE @START_DATE date,
        @END_DATE date

SET @START_DATE = '20211207'
SET @END_DATE = GETDATE()   -- '20211213'

SELECT
   TheDate,
   I.Itemnumber,
   I.QOH
FROM dbo.Dim_Calendar CAL
LEFT JOIN dbo.Dim_Items I On CAL.TheDate BETWEEN CAST(I.EffectiveDate as DATE) 
                                             AND I.ExpirationDate
                         AND I.Itemnumber = 372620
WHERE CAL.TheDate >= @START_DATE
    AND CAL.TheDate <= @END_DATE
ORDER BY CAL.TheDate,
            I.ItemNumber

TSQL - 获取数据仓库维度中日期之间的值

TSQL - Get value between dates in data warehouse dimension

sql-server-2017