Last Monday of Last Year

SQL 2008

I am looking at developing a query where I need to use the last Monday of last year, and subsequently going forward every year

In this case it would be

select *
from etc.
where date >=  '2012-12-31 00:00:00.000'

Can anybody help?
Mark WilsonBI DeveloperAsked:
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sdstuberCommented:
dateadd(dd,isnull(nullif((7- datepart(dw,CONVERT(DATETIME,'24/DEC/' + convert(varchar,DATEPART(yyyy,getdate())-1)))+ 2) % 7 ,0),7), CONVERT(DATETIME,'24/DEC/' + convert(varchar,DATEPART(yyyy,getdate())-1)))
Parth MalhanPrincipal EngineerCommented:
To Find Last Any Day of last Year

DECLARE @Date datetime=GETDATE()-DATEPART(dw,GETDATE())+6
SELECT      DATEADD(wk,DATEPART(wk,@Date)*-1,@Date)

OR

SELECT      DATEADD(wk,DATEPART(wk,GETDATE()-DATEPART(dw,GETDATE())+6)*-1,GETDATE()-DATEPART(dw,GETDATE())+6)

Where 6 is the Day of Week like below

1      :      Sunday
2      :      Monday
3      :      Tuesday
4      :      Wednesday
5      :      Thrusday
6      :      Friday
7      :      Saturday
Saurabh BhadauriaCommented:
set Datefirst 1

declare @date datetime

set @date=GETDATE()
SELECT  dateadd(day, 1-datepart(dw,DATEADD(ms,-3,DATEADD(yy,0,DATEADD(yy,DATEDIFF(yy,0,@date),0)))) ,
 DATEADD(ms,-3,DATEADD(yy,0,DATEADD(yy,DATEDIFF(yy,0,@date),0))))
YZlatCommented: 
CREATE FUNCTION dbo.getLastMondayOfYear
(@yr VARCHAR(4))
RETURNS DATETIME
AS
BEGIN
DECLARE @firstDayOfMonth DATETIME
SET @firstDayOfMonth='12/01/' + @yr 
DECLARE @dayWeek int
SET @dayWeek = DATEPART(DW,@firstDayOfMonth) 
DECLARE @count int
SET @count = ((10 - @dayWeek) % 7) + 27
DECLARE @outputDate datetime
SET @outputdate = CONVERT(VARCHAR(10),DATEADD(day,@count,@firstDayOfMonth),101)
RETURN @outputdate
END

Open in new window


then call it as

select dbo.getLastMondayOfYear('2013')

Open in new window

Scott PletcherSenior DBACommented:
SELECT date, DATEADD(DAY, DATEDIFF(DAY, 0, CAST(YEAR(GETDATE()) - 1 AS char(4)) + '1231') / 7 * 7, 0)


That code works with any date and language settings =
SET DATEFIRST <any>   and
SET LANGUAGE <any>


Some other sample dates and results:

SET DATEFIRST 4 --just an example, to test

SELECT date, DATEADD(DAY, DATEDIFF(DAY, 0, CAST(YEAR(date) - 1 AS char(4)) + '1231') / 7 * 7, 0)
FROM (
    SELECT '20130114' AS date UNION ALL
    SELECT '20140114' UNION ALL
    SELECT '20150114' UNION ALL
    SELECT '20120114'
) AS test_dates

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Microsoft SQL Server 2008

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