当一列不唯一时避免重复行

Question

我正在创建一个总共使用大约 20 列的查询。由于一列不同，我有很多重复的记录。此列是一种标志，只能包含“Y”或“N”。我的问题是，如果标志是“Y”，那么对于同一个声明，还有一个带有“N”标志的附加行。我怎样才能只显示带有“Y”的行。旁注：有些结果只有一个正确的“N”，所以我不能在 where 子句中使用 flag = 'Y'。

查询：

if object_id('tempdb.dbo.#HeaderCount') is not null drop table #HeaderCount
Select Distinct 
[MCO Claim ID (ICN)] = c.claimid
,[Header Claim Acceptance Status] = Case When c.reject = 'Y' Then 'X' Else 'A' End
,[Header Claim Source Status] = Case When c.ClaimID not like '%A%' or c.claimid not like '%R%'                                                                           Then 'OR'
                                 When c.claimID like '%A%' Then 'AJ'
                                 When c.claimID like '%R%' Then 'RV' End
,[Header Claim Ever Pended] = Case When ca.Orig_Status = 'PEND' Then 'Y' Else 'N' End 
,[Header Claim Adjudication Payment Status] =  c.Status
,[Member Medicaid ID] = ek.carriermemid
,[LDH Billing Provider ID] = '' --Optional
,[Billing Provider NPI] = p2.NPI
,[Servicing Provider NPI] = p.NPI
,[Header From Date of Service] = cast(c.StartDate as date)
,[Header To Date of Service] = cast(c.EndDate as date)
,[Date Claim Received by the MCO] = cast(c.CleanDate as date)
,[Date Claim Adjudicated by the MCO] = cast(c.adjuddate as date)
,[Date Claim Paid by the MCO] = cast(c.paiddate as date)
,[Billed Charges] = c.totalamt
,[MCO Paid Amount] = c.totalpaid
,c.formtype
,[BillType] = c.FacilityCode + c.BillClassCode
,c.reject
,c.status
into #HeaderCount
from PlanReport_QNXT_LA.dbo.claim c (NOLOCK)
left join PlanReport_QNXT_LA.dbo.affiliation a2     (NOLOCK)--pay to affiliation
on a2.affiliationid = c.affiliationid
left join PlanReport_QNXT_LA.dbo.provider p2    (NOLOCK)    --pay to provider
on a2.affiliateid = p2.provid
inner join PlanReport_QNXT_LA.dbo.provider p    (NOLOCK)    --rendering provider
on p.provid = c.provid
inner join PlanReport_QNXT_LA.dbo.claim_audit ca    (NOLOCK)
on c.claimid = ca.claimid
inner join PlanReport_QNXT_LA.dbo.member m      (NOLOCK)
on c.memid = m.memid
inner join PlanReport_QNXT_LA.dbo.enrollkeys ek     (NOLOCK)
on m.memid = ek.memid
and ek.segtype = 'int'
Where c.cleandate between '1/1/2017' and '1/31/2017'
Order By c.claimid

我只想为每个 [MCO Claim ID (ICN)] 在 [Header Claim Ever Pended] 列中同时包含“Y”和“N”的一行（“Y”行）查看。我认为按行号分区可能是解决方案？

如果我需要提供更多信息或者这没有意义，请告诉我。我正在努力在解决我遇到的 VPN 问题后立即提供示例数据。提前致谢。

以下是一些示例数据：

[MCO Claim ID (ICN)] [Header Claim Ever Pended]

1 15059C063424A1 是的

2 15059C063424A1 否

3 15218C098293A2 否

在上面的示例中，假设每列（未显示）中的所有值对于第 1 行和第 2 行都是相同的，除了列 [Header Claim Ever Pended]。我只想查看每个 claimid 的“Y”记录（如果存在）（不是 Y 和 N 记录）。另外，如果 [MCO Claim ID (ICN)] 没有“Y”记录，那么我想查看“N”记录。

Answer 1

添加 ROW_NUMBER：

with cte as
 ( -- DISTINCT is calulated after ROW_NUMBER
    Select Distinct 
    [MCO Claim ID (ICN)] = c.claimid
    ,[Header Claim Acceptance Status] = Case When c.reject = 'Y' Then 'X' Else 'A' End
    ,[Header Claim Source Status] = Case When c.ClaimID not like '%A%' or c.claimid not like '%R%'                                                                           Then 'OR'
                                     When c.claimID like '%A%' Then 'AJ'
                                     When c.claimID like '%R%' Then 'RV' End
    ,[Header Claim Ever Pended] = Case When ca.Orig_Status = 'PEND' Then 'Y' Else 'N' End 
    ,[Header Claim Adjudication Payment Status] =  c.Status
    ,[Member Medicaid ID] = ek.carriermemid
    ,[LDH Billing Provider ID] = '' --Optional
    ,[Billing Provider NPI] = p2.NPI
    ,[Servicing Provider NPI] = p.NPI
    ,[Header From Date of Service] = cast(c.StartDate as date)
    ,[Header To Date of Service] = cast(c.EndDate as date)
    ,[Date Claim Received by the MCO] = cast(c.CleanDate as date)
    ,[Date Claim Adjudicated by the MCO] = cast(c.adjuddate as date)
    ,[Date Claim Paid by the MCO] = cast(c.paiddate as date)
    ,[Billed Charges] = c.totalamt
    ,[MCO Paid Amount] = c.totalpaid
    ,c.formtype
    ,[BillType] = c.FacilityCode + c.BillClassCode
    ,c.reject
    ,c.status
    from PlanReport_QNXT_LA.dbo.claim c (NOLOCK)
    left join PlanReport_QNXT_LA.dbo.affiliation a2     (NOLOCK)--pay to affiliation
    on a2.affiliationid = c.affiliationid
    left join PlanReport_QNXT_LA.dbo.provider p2    (NOLOCK)    --pay to provider
    on a2.affiliateid = p2.provid
    inner join PlanReport_QNXT_LA.dbo.provider p    (NOLOCK)    --rendering provider
    on p.provid = c.provid
    inner join PlanReport_QNXT_LA.dbo.claim_audit ca    (NOLOCK)
    on c.claimid = ca.claimid
    inner join PlanReport_QNXT_LA.dbo.member m      (NOLOCK)
    on c.memid = m.memid
    inner join PlanReport_QNXT_LA.dbo.enrollkeys ek     (NOLOCK)
    on m.memid = ek.memid
    and ek.segtype = 'int'
    Where c.cleandate between '1/1/2017' and '1/31/2017'
 ),
cte_with_rn as
 ( -- now apply the ROW_NUMBER
   select *,
      row_number()
      over (partition by  [MCO Claim ID (ICN)]
            order by [Header Claim Ever Pended] desc) as rn -- 'Y' sorts before 'N'
   from cte
 )
select *   -- change to all colujmns except rn
into #HeaderCount
from cte_with_rn 
where rn = 1
Order By claimid

Answer 2

这成功了...

Select ROW_NUMBER() over(PARTITION BY [MCO Claim ID (ICN)] ORDER BY 
[Header Claim Ever Pended] Desc) Row#
Into #temptable
From #HeaderCount

Select *
From #temptable
Where Row# = 1