last weeks dates

Hello
I want to be able to select last full weeks data from todays date - so, today being 22/01/2014 then I would like last weeks data from Sunday 12th to 18th Saturday

select *
from mytable
where date ??

Regards
PHIL SawyerAsked:
Who is Participating?
 
Scott PletcherSenior DBACommented:
Code below will pick the first Sunday on or before the @base_date + @days_back:

DECLARE @base_date datetime
DECLARE @days_back int
SET @base_date = GETDATE()
SET @days_back = -7

SELECT
    DATEADD(DAY, (DATEDIFF(DAY, 6, @base_date) + @days_back) / 7 * 7, 6) AS start_date,
    DATEADD(DAY, (DATEDIFF(DAY, 6, @base_date) + @days_back) / 7 * 7 + 6, 6) AS end_date
0
 
Surendra NathTechnology LeadCommented:
check the below code
DECLARE @Dt DATETIME 
SELECT @dt = GETDATE()
select DATEADD(day,CASE DATENAME(weekday,dateadd(dd,-7,@dt))      
            WHEN 'Sunday'       THEN 0
            WHEN 'Monday'       THEN -1
            WHEN 'Tuesday'      THEN -2
            WHEN 'Wednesday'    THEN -3
            WHEN 'Thursday'     THEN -4
            WHEN 'Friday'       THEN -5
            WHEN 'Saturday'     THEN -6
        END,dateadd(dd,-7,@dt))
        ,DATEADD(dd,6,
                        DATEADD(day,CASE DATENAME(weekday,dateadd(dd,-7,@dt))      
                                    WHEN 'Sunday'       THEN 0
                                    WHEN 'Monday'       THEN -1
                                    WHEN 'Tuesday'      THEN -2
                                    WHEN 'Wednesday'    THEN -3
                                    WHEN 'Thursday'     THEN -4
                                    WHEN 'Friday'       THEN -5
                                    WHEN 'Saturday'     THEN -6
                                END,dateadd(dd,-7,@dt))
                                )

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PHIL SawyerAuthor Commented:
Thanks Scott - this works a treat
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