在 SQL Server 2008r2 中将天转换为周

Question

我有一个表，其唯一的日期字段是 smalldatetime 和 DOW（第 1 周的第 1 天 = 星期日）。

我需要汇总这些天以获取特定周/年组合的每周平均值（以下脚本不包含小时和分钟）。

如何将 smalldate 和 DOW 转换为年和周#？我有一个可以链接到的表，它使用星期六（DOW 7）作为 WeekEndDate，如果我能做到那么远，我可以链接到该表。任何帮助将不胜感激。

例如，此语句提供以下结果：

select a.LOB_Code, a.store, day, DOW, hour, minutes, (sum(NetTrans)/1.000)sumNetTrans

from facts.Store_Day_TransBy30 a

inner join facts.Stores b on a.Store = b.Store

where A.store = 8169 and DAY between '1/3/2016' and '1/4/2016' 

group by a.LOB_Code, a.store, day, DOW, hour, minutes

order by a.LOB_Code, a.store, day, DOW, hour, minutes

enter image description here

Answer 1

这里还有另一个带有临时表和手动生成数据的查询。始终建议提供一些示例数据以获取完整的图片。

SET NOCOUNT ON;
CREATE TABLE DemoTable
(
ID INT IDENTITY(1,1) NOT NULL,
DateCreated SMALLDATETIME,
DOW TINYINT NOT NULL, -- This can be generated runtime(DATEPART(DW,date column)) but as your table contain thsi column I've purposefully added here.
TmpCount INT NOT NULL -- Random column used for aggregation
)

-- Populate some records 

DECLARE @CurrentDate DATE='2015-01-01'

WHILE @CurrentDate <='2016-12-31'
BEGIN

    INSERT DemoTable
    (
        DateCreated,
        DOW,
        TmpCount
    )
    SELECT
        @CurrentDate AS DateCreated,
        DATEPART(DW,@CurrentDate) AS DOW,
        ABS(Checksum(NewID()) % 6) + 1 AS TmpCount

    SET @CurrentDate=DATEADD(dd,1,@CurrentDate)
END

-- Retrieve aggregated data 
SELECT 
    YEAR(DateCreated) AS Year#
    ,DATEPART(WK,DateCreated) AS Week#
    ,SUM(TmpCount) AS TmpSum 
FROM DemoTable
GROUP BY YEAR(DateCreated),DATEPART(WK,DateCreated)
ORDER BY 1,2
-- Drop Table

DROP TABLE DemoTable

Answer 2

我假设 day 列是数据类型，这是可以帮助你的查询。

SELECT
    a.LOB_Code, 
    a.store, 
    day,
    DOW, 
    hour, 
    minutes, 
    (sum(NetTrans)/1.000)sumNetTrans,
    YEAR([day]) AS Year#,
    DATEPART(WK,[day]) AS Week#

from facts.Store_Day_TransBy30 a

inner join facts.Stores b on a.Store = b.Store

where A.store = 8169 and DAY between '1/3/2016' and '1/4/2016' 

group by a.LOB_Code, a.store, day, DOW, hour, minutes,YEAR([day]),DATEPART(WK,[day])

order by a.LOB_Code, a.store, day, DOW, hour, minutes