我不知道如何循环以便查询显示报告日期的所有周？
代码确定Mon - Sun周，然后应该在临时表中插入值，然后查询周。我已经对report_date进行了硬编码，并且它可以显示多条记录。
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
答案 0 :(得分：1)
使用DATEADD并更新@interval初始化和更新的循环逻辑：
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位和后5位）：
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
另外，如果您不需要存储时间，也可以使用date类型而不是Datetime。
答案 1 :(得分：0)
如果您想列出周数和相应的计数或总和，您可以按照以下步骤进行操作
示例数据
myDate
----------
2012-03-15
2012-03-15
2012-03-15
2012-03-14
2012-03-14
2012-03-14
2012-03-14
2012-03-09
2012-03-09
2012-03-09
2012-03-08
2012-03-08
2012-03-08
2012-03-01
2012-03-01
2012-03-01
2012-03-01
2012-02-29
2012-02-29
2012-02-29
2012-02-29
2012-02-23
2012-02-23
2012-02-23
2012-02-22
2012-02-22
2012-02-22
2012-02-22
示例数据的脚本
create table #myTable(mydate Date)
insert into #myTable select DATEADD(day, -1, getdate())
insert into #myTable select DATEADD(day, -1, getdate())
insert into #myTable select DATEADD(day, -1, getdate())
insert into #myTable select DATEADD(day, -2, getdate())
insert into #myTable select DATEADD(day, -2, getdate())
insert into #myTable select DATEADD(day, -2, getdate())
insert into #myTable select DATEADD(day, -2, getdate())
insert into #myTable select DATEADD(day, -7, getdate())
insert into #myTable select DATEADD(day, -7, getdate())
insert into #myTable select DATEADD(day, -7, getdate())
insert into #myTable select DATEADD(day, -8, getdate())
insert into #myTable select DATEADD(day, -8, getdate())
insert into #myTable select DATEADD(day, -8, getdate())
insert into #myTable select DATEADD(day, -15, getdate())
insert into #myTable select DATEADD(day, -15, getdate())
insert into #myTable select DATEADD(day, -15, getdate())
insert into #myTable select DATEADD(day, -15, getdate())
insert into #myTable select DATEADD(day, -16, getdate())
insert into #myTable select DATEADD(day, -16, getdate())
insert into #myTable select DATEADD(day, -16, getdate())
insert into #myTable select DATEADD(day, -16, getdate())
insert into #myTable select DATEADD(day, -22, getdate())
insert into #myTable select DATEADD(day, -22, getdate())
insert into #myTable select DATEADD(day, -22, getdate())
insert into #myTable select DATEADD(day, -23, getdate())
insert into #myTable select DATEADD(day, -23, getdate())
insert into #myTable select DATEADD(day, -23, getdate())
insert into #myTable select DATEADD(day, -23, getdate())
预期结果
Count WeekStart WeekEnd
----- ---------- ----------
7 2012-02-20 2012-02-24
8 2012-02-27 2012-03-02
6 2012-03-05 2012-03-09
7 2012-03-12 2012-03-16
如何操作
SET DATEFIRST 1
SELECT
COUNT(*) [Count],
DATEADD(DD, -(DATEPART(DW, mydate)-1), mydate) [WeekStart],
DATEADD(DD, 7-(DATEPART(DW, mydate)+2), mydate) [WeekEnd]
FROM
#myTable
WHERE
DATEPART(dw, mydate) >= 1 AND DATEPART(dw, mydate) <= 5 -- only weekdays
GROUP BY
DATEADD(DD, -(DATEPART(DW, mydate)-1), mydate),
DATEADD(DD, 7-(DATEPART(DW, mydate)+2), mydate)
ORDER BY
DATEADD(DD, -(DATEPART(DW, mydate)-1), mydate)