DWOperations
 usp_DimStudentReceiptLoad_DupKeyCheck (Stored Procedure)
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Current Path:  DWOperations   Stored Procedures   usp_DimStudentReceiptLoad_DupKeyCheck
  Properties
Property Value
Name usp_DimStudentReceiptLoad_DupKeyCheck
Schema dbo
Is Encrypted False
Ansi Nulls Status True
Quoted Identifier Status True
Description
  Parameters
Name Data Type Direction Description
  Parent Dependencies (objects that usp_DimStudentReceiptLoad_DupKeyCheck depends on)
Name Type
Table
  Child Dependencies (objects that depend on usp_DimStudentReceiptLoad_DupKeyCheck)
Name Type
TABLE
  Extended Properties
Object Property Value
   Annotations
Object Property Value
  DDL
/****** Object: StoredProcedure [dbo].[usp_DimStudentReceiptLoad_DupKeyCheck] Script Date: 03/09/2017 17:21:49 ******/
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
/*
Name:            usp_DimStudentReceiptLoad_DupKeyCheck
Title:            Mark Duplicate Student Receipt Dimension
Date:            10/02/2013
System/Project:    Executive Dashboard - Student Financials
Description:    This procedure will mark duplicate Student Receipt records and which one to select.
Revision History:
*/
CREATE PROC [dbo].[usp_DimStudentReceiptLoad_DupKeyCheck]
AS 
SET NOCOUNT ON
-- Create in-memory table for later use within this proc
CREATE TABLE #Stdnt_Receipt_Dup
    (
    [StudentReceiptAK] VARCHAR(24) NOT NULL
    )
-- populate table with duplicate StudentReceiptAK values
INSERT INTO #Stdnt_Receipt_Dup
    (
    [StudentReceiptAK]
    )
    select StudentReceiptAK
    from Verify_dbo_DimStudentReceipt
    group by StudentReceiptAK
    having COUNT(StudentReceiptAK) > 1
    
--Detect duplicate records and set flag
UPDATE Verify_dbo_DimStudentReceipt
SET RowIsDuplicate = 'Y'
FROM Verify_dbo_DimStudentReceipt
WHERE StudentReceiptAK 
IN
 (
 select StudentReceiptAK
 from #Stdnt_Receipt_Dup
 );
--Set RowIsSelected = N for duplicated records (detected above)
UPDATE RecordsToIgnore
SET RowIsSelected = 'N'
FROM dbo.Verify_dbo_DimStudentReceipt RecordsToIgnore
INNER JOIN
 (
 --Returns the first record for a set of duplicated StudentReceipt
 --(as defined as minimum of surrogate key of temp table)
 SELECT StudentReceiptAK, MIN(VerifyStudentReceiptSK) as Min_VerifyStudentReceiptSK
 FROM Verify_dbo_DimStudentReceipt
 WHERE StudentReceiptAK in
  (
    select StudentReceiptAK
    from #Stdnt_Receipt_Dup
  ) 
 GROUP BY StudentReceiptAK 
 ) as Keeper
ON (
 Keeper.StudentReceiptAK = RecordsToIgnore.StudentReceiptAK
 AND
 Keeper.Min_VerifyStudentReceiptSK <> RecordsToIgnore.VerifyStudentReceiptSK
 )
WHERE RecordsToIgnore.RowIsDuplicate = 'Y';
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