如何计算每天的记录数？

Question

我有一个具有以下结构的表:

CustID --- DateAdded ---

 396       2012-02-09 
 396       2012-02-09 
 396       2012-02-08 
 396       2012-02-07 
 396       2012-02-07
 396       2012-02-07 
 396       2012-02-06
 396       2012-02-06

我想知道如何计算SQL中过去7天每天的记录数,然后将其作为整数返回.

目前我编写了以下SQL查询:

SELECT * 
  FROM Responses
 WHERE DateAdded >= dateadd(day, datediff(day, 0, GetDate()) - 7, 0)

RETURN

但是,这仅返回过去7天的所有条目.如何计算过去7天内每天的记录？

Answer 1

select DateAdded, count(CustID)
from Responses
WHERE DateAdded >=dateadd(day,datediff(day,0,GetDate())- 7,0)
GROUP BY DateAdded

Answer 2

select DateAdded, count(CustID)
from tbl
group by DateAdded

大约7天的间隔是DB依赖的问题