从SQL查询中获取重复记录

Question

在SQL Server中运行该查询时，有没有人可以帮助我获取重复记录。我甚至尝试了左和右BILL_DETAILID的两个场景中的内部联接，我得到了重复记录＆amp;也使用＆＃34; distinct＆＃34;但仍面临同样的问题。我想摆脱这个。

SELECT
    BILL_DETAIL.id AS BILLDETAILID,
    BILL_HEADER.id AS BILLHEADERID,
    adjustment.id adjustmentID 
FROM 
    BILLHEADER 
INNER JOIN
    BILL_DETAIL ON BILL_DETAIL.billdetail2billhdr = BILLHEADER.id 
LEFT JOIN
    adjustment ON adjustment.adjustment2bill_detail = BILLDETAIL.id 
INNER JOIN
    incident ON incident.case2billhdr = BILLHEADER.id

Answer 1

试试这个

WITH CTE
AS
(
  select 
   SeqNo = ROW_NUMBER() OVER(PARTITON BY BILL_DETAIL.id,BILL_HEADER.id ORDER BY adjustment.id DESC ),
   BILL_DETAIL.id as BILLDETAILID,
   BILL_HEADER.id as BILLHEADERID,
   adjustment.id adjustmentID 
  from  BILLHEADER 
  Inner JOIN  BILL_DETAIL ON BILL_DETAIL.billdetail2billhdr=BILLHEADER.id 
  left join adjustment on adjustment.adjustment2bill_detail=BILLDETAIL.id 
  inner join incident on incident.case2billhdr=BILLHEADER.id
)
SELECT
  *
  FROM CTE
    WHERE SeqNo = 1

这将返回每个BILL_DETAIL.id + BILL_HEADER.id组合的第一个adjust.id

Answer 2

我想我明白你要做什么，试试：

<击>

<击>

select 
   BILL_DETAIL.id as BILLDETAILID,
   BILL_HEADER.id as BILLHEADERID,
   MAX(adjustment.id) as adjustmentID 
from  BILLHEADER 
Inner JOIN  BILL_DETAIL ON BILL_DETAIL.billdetail2billhdr=BILLHEADER.id 
left join adjustment on adjustment.adjustment2bill_detail=BILLDETAIL.id 
inner join incident on incident.case2billhdr=BILLHEADER.id
group by BILL_DETAIL.id,BILL_HEADER.id

<击>

select billdetailid,
       billheadid,
       adjustmentid
from
(SELECT
    BILL_DETAIL.id AS BILLDETAILID,
    BILL_HEADER.id AS BILLHEADERID,
    adjustment.id adjustmentID,
    row_number() over(partition by bill_detail.id, bill_header.id order by adjustment.id desc) rn
FROM 
    BILLHEADER 
INNER JOIN
    BILL_DETAIL ON BILL_DETAIL.billdetail2billhdr = BILLHEADER.id 
LEFT JOIN
    adjustment ON adjustment.adjustment2bill_detail = BILLDETAIL.id 
INNER JOIN
    incident ON incident.case2billhdr = BILLHEADER.id) t1
where t1.rn = 1

Answer 3

您可以尝试使用此脚本。

MySqlConnection