Select distinct
  a.cr_id,Case 
    When ca.ca_vote = 'Approve' and ca.ca_title='MANAGER' Then ca.ca_email
    When ca.ca_vote = 'Reject' Then ''
    When ca.ca_vote = 'Pending' Then ''
    When ca.ca_vote = 'IN PROCESS' Then ''
  End as ca_email
from
  credit a
  inner join credit_approvals ca on ca.c_id=a.cr_id
where 
  a.cr_cs_date between Convert(varchar(20),'11/16/2011',101) and dateadd(day,1,convert  (varchar(20),101))
order by
  a.cr_id

尽管cr_id不同,它仍然显示重复值.请让我知道如何处理这个问题,以便我能够只显示不同的记录.