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Find Next Related Record By Date

Find Next Related Record By Date

First off this is not my database I am just fixing a report. I have two tables with following relevant fields.

Table 1 AR_Detail
Fields AR_Detail_Id, P_Id, Trans_Type, Posting_Stamp

Table 2 Assessed_Values
Field Value_Id, P_Id, History_Id, Assessed_Value, Change_Date

Their only related field is P_ID. This report is pulling the AR_Detail records where Trans_Type is 'avc' and I need the Assessed_Value that is the first record where Change_Date is >= Posting_Stamp.

The problem I am having is someone entered a wrong assessed value change and then made a correct assessed value change and I can't get the AR_Detail record and it subsequent Assesed_Values record to match up.

I can make a View or Stored Procedure for the report source.

RE: Find Next Related Record By Date

Pretty sure there are some other ways to do this, but this should work (once you clean up whatever I got wrong from writing code I can't test):


SELECT {the fields you need from AR_Detail}, AssessedValue
  FROM AR_Detail ARD
    JOIN Assessed_Values AV
      ON ARD.P_Id = AV.P_Id
    WHERE AV.Change_Date = 
      (SELECT MIN(AV2.Change_Date)
         FROM Assessed_Values AV2
         WHERE AV2.P_Id = ARD.P_Id
           AND AV2.Change_Date > ARD.Posting_Stamp) 


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