How to get the start and end date for a year and week number, eg YYYYWW?


I have an int that holds information about a year and week: YYYYWW, ex:
declare @currentweek int
set @currentweek = 200836

From this, how can I get the start and end date for this week?

PS: I would also like to specify if the week starts with sunday or monday.

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declare @currentweek int
set @currentweek = 200801
declare @firstDayYear as datetime
set @firstDayYear = CAST('01/01/' + LEFT(@currentweek,4) AS DATETIME)
set @currentweek = RIGHT(@currentweek,2)
select dateadd(d,(((7*@currentweek)-datepart(dw,@firstDayYear))-6),@firstDayYear) as FirstDate
select dateadd(d,((7*@currentweek)-datepart(dw,@firstDayYear)),@firstDayYear) as lastDate

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oxyooAuthor Commented:
Exactly what I needed, many thanks!!
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Microsoft SQL Server 2005

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