显示报告周 [英] displaying reporting weeks

问题描述

我不知道如何循环以便查询显示从报告日期开始的所有周?

I dont know how to loop through so that the query displays all the weeks from the reporting date?

代码确定周一至周日，然后应将值插入临时表中，然后查询周.我对 report_date 进行了硬编码，它应该显示不止一条记录.

The code determines the Mon - Sun week then should insert the values in a temp table to then query the weeks. I have hard coded the report_date and its hould display more than one record.

任何想法

DECLARE @REPORT_DATE DATETIME, @WEEK_BEGINING VARCHAR(10)
SELECT @REPORT_DATE = '2011-01-01T00:00:00'
--SELECT @REPORT_DATE = GETDATE() -- should grab the date now.
SELECT @WEEK_BEGINING = 'MONDAY'
IF @WEEK_BEGINING = 'MONDAY'
SET DATEFIRST 1
ELSE IF @WEEK_BEGINING = 'TUESDAY'
SET DATEFIRST 2
ELSE IF @WEEK_BEGINING = 'WEDNESDAY'
SET DATEFIRST 3
ELSE IF @WEEK_BEGINING = 'THURSDAY'
SET DATEFIRST 4
ELSE IF @WEEK_BEGINING = 'FRIDAY'
SET DATEFIRST 5
ELSE IF @WEEK_BEGINING = 'SATURDAY'
SET DATEFIRST 6
ELSE IF @WEEK_BEGINING = 'SUNDAY'
SET DATEFIRST 7
DECLARE @WEEK_START_DATE DATETIME, @WEEK_END_DATE DATETIME
--GET THE WEEK START DATE
SELECT @WEEK_START_DATE = @REPORT_DATE - (DATEPART(DW, @REPORT_DATE) - 1)
--GET THE WEEK END DATE
SELECT @WEEK_END_DATE = @REPORT_DATE + (7 - DATEPART(DW, @REPORT_DATE))
PRINT 'Week Start: ' + CONVERT(VARCHAR, @WEEK_START_DATE)
PRINT 'Week End: ' + CONVERT(VARCHAR, @WEEK_END_DATE)

CREATE TABLE #WeekList
    (
    month_date date
    )


DECLARE @Interval int = 1

INSERT INTO #WeekList SELECT @WEEK_START_DATE

WHILE @Interval < 1
    BEGIN
    INSERT INTO #WeekList SELECT DATEADD(MONTH, - @Interval, @WEEK_START_DATE)
    SET @Interval = @Interval + 1
    END

SELECT  
--Create the month ID code:     

@WEEK_START_DATE AS Start_Week, @WEEK_END_DATE AS End_Week


FROM #WeekList
ORDER BY Start_Week DESC

DROP TABLE #WeekList

推荐答案

使用 DATEADD 并更新您的 @interval 初始化和更新的循环逻辑:

Using DATEADD and updating your @interval initialization and updated loop logic:

DECLARE @REPORT_DATE DATETIME, @WEEK_BEGINING VARCHAR(10)
SELECT @REPORT_DATE = '2011-01-01T00:00:00'
--SELECT @REPORT_DATE = GETDATE() -- should grab the date now.
SELECT @WEEK_BEGINING = 'MONDAY'
IF @WEEK_BEGINING = 'MONDAY'
SET DATEFIRST 1
ELSE IF @WEEK_BEGINING = 'TUESDAY'
SET DATEFIRST 2
ELSE IF @WEEK_BEGINING = 'WEDNESDAY'
SET DATEFIRST 3
ELSE IF @WEEK_BEGINING = 'THURSDAY'
SET DATEFIRST 4
ELSE IF @WEEK_BEGINING = 'FRIDAY'
SET DATEFIRST 5
ELSE IF @WEEK_BEGINING = 'SATURDAY'
SET DATEFIRST 6
ELSE IF @WEEK_BEGINING = 'SUNDAY'
SET DATEFIRST 7
DECLARE @WEEK_START_DATE DATETIME, @WEEK_END_DATE DATETIME
--GET THE WEEK START DATE
SELECT @WEEK_START_DATE = @REPORT_DATE - (DATEPART(DW, @REPORT_DATE) - 1)
--GET THE WEEK END DATE
SELECT @WEEK_END_DATE = @REPORT_DATE + (7 - DATEPART(DW, @REPORT_DATE))
PRINT 'Week Start: ' + CONVERT(VARCHAR, @WEEK_START_DATE)
PRINT 'Week End: ' + CONVERT(VARCHAR, @WEEK_END_DATE)

DECLARE @Interval int = datediff(WEEK,getdate(),@WEEK_START_DATE)+1

SELECT Start_Week=@WEEK_START_DATE
, End_Week=@WEEK_END_DATE
INTO #WeekList

WHILE @Interval <= 0
    BEGIN
    set @WEEK_START_DATE=DATEADD(WEEK,1,@WEEK_START_DATE)
    set @WEEK_END_DATE=DATEADD(WEEK,1,@WEEK_END_DATE)
    INSERT INTO #WeekList values (@WEEK_START_DATE,@WEEK_END_DATE)
    SET @Interval += 1;
    END

SELECT *
FROM #WeekList
ORDER BY Start_Week DESC

DROP TABLE #WeekList

结果(列表的前 5 名和后 5 名):

Results (top 5 and bottom 5 of list):

Start_Week              End_Week
----------------------- -----------------------
2012-03-12 00:00:00.000 2012-03-18 00:00:00.000
2012-03-05 00:00:00.000 2012-03-11 00:00:00.000
2012-02-27 00:00:00.000 2012-03-04 00:00:00.000
2012-02-20 00:00:00.000 2012-02-26 00:00:00.000
2012-02-13 00:00:00.000 2012-02-19 00:00:00.000
...
2011-01-24 00:00:00.000 2011-01-30 00:00:00.000
2011-01-17 00:00:00.000 2011-01-23 00:00:00.000
2011-01-10 00:00:00.000 2011-01-16 00:00:00.000
2011-01-03 00:00:00.000 2011-01-09 00:00:00.000
2010-12-27 00:00:00.000 2011-01-02 00:00:00.000

顺便说一句，如果您不需要存储时间，您也可以使用 date 类型代替 Datetime.

As an aside, you could also use the date type instead of Datetime, if you don't need to store the time.

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