MS SQL Server 2008 :週の開始日と終了日を次の8週間に取得する

これを試してください:

DECLARE @startDate DATETIME
DECLARE @currentDate DATETIME
DECLARE @numberOfWeeks INT

DECLARE @dates TABLE(
    StartDate DateTime,
    EndDate DateTime 
)

SET @startDate = GETDATE()--'2012-01-01' -- Put whatever you want here
SET @numberOfWeeks = 8 -- Choose number of weeks here
SET @currentDate = @startDate

while @currentDate < dateadd(week, @numberOfWeeks, @startDate)
begin
    INSERT INTO @Dates(StartDate, EndDate) VALUES (@currentDate, dateadd(day, 6, @currentDate))
    set @currentDate = dateadd(day, 7, @currentDate);
end

SELECT * FROM @dates

これにより、次のような結果が得られます:

StartDate           EndDate 
21/03/2013 11:22:46 27/03/2013 11:22:46 
28/03/2013 11:22:46 03/04/2013 11:22:46 
04/04/2013 11:22:46 10/04/2013 11:22:46 
11/04/2013 11:22:46 17/04/2013 11:22:46 
18/04/2013 11:22:46 24/04/2013 11:22:46 
25/04/2013 11:22:46 01/05/2013 11:22:46 
02/05/2013 11:22:46 08/05/2013 11:22:46 
09/05/2013 11:22:46 15/05/2013 11:22:46 

または、時間コンポーネントが必要ない場合は、次のように最終的な選択を微調整できます:

SELECT CONVERT(VARCHAR, StartDate, 103), CONVERT(VARCHAR, EndDate, 103) FROM @dates