取得上周一和上周日sql语句

select title from info where DATEDIFF(DD,DATEADD(DW,-6-DATEPART(DW,getdate()),getdate()),title_date)=0;

select * from info 
where  DATEDIFF(dd,DATEADD(day,-7,DATEADD(week, DATEDIFF(week, '', getdate()), '')),titleddtime) =0
or
  DATEDIFF(dd,DATEADD(day,-5,DATEADD(week, DATEDIFF(week, '', getdate()), '')),titleddtime) =0
or
  DATEDIFF(dd,DATEADD(day,-3,DATEADD(week, DATEDIFF(week, '', getdate()), '')),titleddtime) =0

SET DATEFIRST 1
DECLARE @day1 DATETIME
DECLARE @day7temp DATETIME
DECLARE @day7 VARCHAR(100)
SET @day1 = convert(char(10),dateadd(dd, - DATEPART (weekday , getdate())-6,getdate()),120)
SET @day7temp = convert(char(10),dateadd(dd, - DATEPART (weekday , getdate()),getdate()),120)
SET @day7 = CAST(YEAR(@day7temp) AS VARCHAR(4)) + '-' + CAST(MONTH(@day7temp) AS VARCHAR(2)) + '-' + CAST(DAY(@day7temp) AS VARCHAR(2)) + ' 23:59:59'
select  @day1
select @day7