如何按日期比较同一表的行？ （SQL Server）

Question

SQL Gurus，我正在寻找一些代码帮助，以便在某些约束条件下将行相互比较。以下是我在桌子上看到的一小部分内容。我想要做的是只返回行的帽子有一个已确认的Review_Detail_Status，其传真日期大于Insufficient行的Review_Date。注意：我将比较具有相同Processing_Instance的批次。

Processing_Instance    Review_Id              GMPI                   MemberID               Review_Date             FAX_DATE    REVIEW_DETAIL_STATUS
    ------------------- ---------------------- ---------------------- ---------------------- ----------------------- ----------------------- -------------------
    23760               11359973               650775278              300601690600           2017-03-30 00:00:00.000 2017-03-27 00:00:00.000 Insufficient
    23760               11237889               650775278              300601690600           2017-03-01 00:00:00.000 2017-02-28 00:00:00.000 Insufficient
    23760               11359973               650775278              300601690600           2017-03-30 00:00:00.000 2017-03-27 00:00:00.000 Confirmed
    23760               11359973               650775278              300601690600           2017-03-30 00:00:00.000 2017-03-27 00:00:00.000 Confirmed
    23760               11237889               650775278              300601690600           2017-03-01 00:00:00.000 2017-02-28 00:00:00.000 Insufficient

现在，我有这个代码。

SELECT Processing_Instance,
       Review_Id,
       GMPI,
       MemberID,
       Review_Date,
       ATTESTATION_FAX_DATE,
       REVIEW_DETAIL_STATUS
FROM TEST
WHERE EXISTS
(
    SELECT 1
    FROM TEST AS WT2
    WHERE WT2.Processing_Instance = TEST.Processing_Instance
    and WT2.GMPI=Test.GMPI
    and WT2.FAX_DATE>TEST.REVIEW_DATE
          /*AND WT2.GMPI = 650775278*/
and WT2.Processing_Instance=23760
);

但它返回：

Processing_Instance Review_Id              GMPI                   MemberID               Review_Date             FAX_DATE    REVIEW_DETAIL_STATUS
------------------- ---------------------- ---------------------- ---------------------- ----------------------- ----------------------- -----------------------
23760               11237889               650775278              300601690600           2017-03-01 00:00:00.000 2017-02-28 00:00:00.000 Insufficient
23760               11237889               650775278              300601690600           2017-03-01 00:00:00.000 2017-02-28 00:00:00.000 Insufficient

我应该（理论上）得到：

 Processing_Instance Review_Id              GMPI                   MemberID               Review_Date             FAX_DATE    REVIEW_DETAIL_STATUS
    ------------------- ---------------------- ---------------------- ---------------------- ----------------------- ----------------------- -----------------------
       23760               11359973               650775278              300601690600           2017-03-30 00:00:00.000 2017-03-27 00:00:00.000 Confirmed
        23760               11359973               650775278              300601690600           2017-03-30 00:00:00.000 2017-03-27 00:00:00.000 Confirmed

谢谢！

Answer 1

翻转您的日期比较，并要求先前的实例状态为String value = "0000000013"; printWriter.println("=\"" + value + "\""); ，并且返回的行为'Insufficient'。

'Confirmed'

rextester演示：http://rextester.com/htysu28824

返回：

select 
    Processing_Instance
  , Review_Id
  , gmpi
  , Memberid
  , Review_Date
  , attestation_fax_date
  , review_detail_status
from test
where review_detail_status = 'confirmed'
  and exists (
    select 1
    from test as wt2
    where wt2.Processing_Instance = test.Processing_Instance
      and wt2.gmpi=Test.gmpi
      and wt2.review_detail_status = 'Insufficient'
      and wt2.attestation_fax_date<test.review_date
      and wt2.Processing_Instance=23760      
);

Answer 2

将返回结果用作子查询。这样您就可以获得所需的内容并将其链接回您想要的任何表/子查询。但请记住，您必须使用子查询中的唯一ID，以便有一个链接。 IE：Processing_ID，Review ID或MemberID应该有效。

在不知道其他表的情况下，我假设您可以将Processing_Instance ID链接到其他表

Select a.column1, a.column2, a.Processing_Instance_ID, b.* 

 --Whatever table you are linking your subquery below to
 from table a

--This join should only return the 2 rows where the Review Date > Fax Date
--This is your subquery
JOIN (Select Processing_Instance,
             Review_Id,
             GMPI,
             MemberID,
             Review_Date,
             ATTESTATION_FAX_DATE,
             REVIEW_DETAIL_STATUS
     From test
     Where Review_Date > Attestation_Fax_Date
      /***Note: You can also do WHERE Review_detail_status = 'Confirmed' 
      rather  than the date comparison. Regardless, you get the same results 
      **/


   ) b on a.Processing_Instance_ID 
      = b.Processing_Instance

Answer 3

这是你在寻找，虽然结果不像你的那样？

http://sqlfiddle.com/#!6/af37d/10

SELECT distinct t1.*
FROM TEST t1
JOIN TEST t2
ON 
      t2.Processing_Instance = t1.Processing_Instance /* comparing batches that have the same Processing_Instance. */
WHERE 
      t1.REVIEW_DETAIL_STATUS = 'Confirmed'         /*have a Review_Detail_Status of Confirmed*/
      and t1.ATTESTATION_FAX_DATE > t2.Review_Date  /*WITH a Fax Date that is greater than the Insufficient row's (see the below) Review_Date*/
      and t2.REVIEW_DETAIL_STATUS = 'Insufficient'  /* the Insufficient row */