조인의 SQL 하위 쿼리

Question

기존 SQL 쿼리를 수정 중입니다. 문제는 테이블의 설명을 기존 데이터에 추가하려고합니다. 그림에 표시된 것처럼 하위 쿼리를 추가했지만 반환 데이터 집합을 변경하는 것으로 보입니다. subquery를 사용하여 올바른 데이터를 얻는 방법을 제안 할 수 있습니까?

SELECT TOP 100 
     ROW_NUMBER() OVER (ORDER BY LTRIM(VW_POLINDEX.SYMBOL) ASC, LTRIM(VW_POLINDEX.POLNUM) ASC, LTRIM(VW_POLINDEX.MODULE) ASC) AS RowNum 
     ,VW_POLINDEX.POLNUM 
     ,VW_POLINDEX.SYMBOL 
     ,VW_POLINDEX.MODULE 
     , 
     --Subquery: 1 This subquery will fetch the description based on the pol details 
     (SELECT TOP 1 
        reasonamendedCd 
      FROM  SHPolicyAmendmentHistory SH 
      WHERE  SH.PolicyNbr = VW_POLINDEX.POLNUM 
        AND SH.PolicySymbolCd = VW_POLINDEX.SYMBOL 
        AND SH.PolicyModuleNbr = Module 
      ORDER BY amendmentnbr DESC 
     ) AS POLSECRIPTION 
     ,VW_POLINDEX.CANCELLD 
FROM VW_POLINDEX WITH (NOLOCK) 
     INNER JOIN LINE_OF_BUS_LIT WITH (NOLOCK) ON VW_POLINDEX.LOB = LINE_OF_BUS_LIT.LOB_CD 
     INNER JOIN POL_STATUS_LIT WITH (NOLOCK) ON VW_POLINDEX.TYPEACT = POL_STATUS_LIT.POL_STATUS_CD 
WHERE (CASE VW_POLINDEX.MODULE 
      WHEN 0 THEN VW_POLINDEX.SYMBOL + '0' 
      ELSE VW_POLINDEX.SYMBOL + '1' 
      END) NOT IN ('RJD1', 'RJH1') 
     AND VW_POLINDEX.LOB = 'HP' 

전류 출력 :

+------+-------+------+------+-------------+---------+ 
|RowNum|POLNUM |SYMBOL|MODULE|POLSECRIPTION|CANCELLD | 
+------+-------+------+------+-------------+---------+ 
|3  |0040026|CCS |2  |<NULL>  |9/12/2006| 
+------+-------+------+------+-------------+---------+ 
|4  |0040026|CCS |3  |<NULL>  |9/12/2010| 
+------+-------+------+------+-------------+---------+ 
|2  |0040026|CCS |1  |<NULL>  |9/12/2006| 
+------+-------+------+------+-------------+---------+ 
|7  |2000010|CCS |2  |XM   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|8  |2000010|CCS |3  |CPP   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|12 |2000025|CCS |0  |RN   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|16 |2000025|CCS |4  |RN   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|6  |2000010|CCS |1  |IC   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|20 |2000029|CCS |1  |RN   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|10 |2000010|CCS |5  |CM   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|11 |2000010|CCS |6  |Z   |7/28/2013| 
+------+-------+------+------+-------------+---------+ 
|24 |2000029|CCS |5  |RN   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|14 |2000025|CCS |2  |RN   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 

예상 출력 (일부 행이 이전 출력에서 ​​누락도 아닌 하위 쿼리를 추가 한 후 정렬됩니다) :

+------+-------+------+------+-------------+---------+ 
|RowNum|POLNUM |SYMBOL|MODULE|POLSECRIPTION|CANCELLD | 
+------+-------+------+------+-------------+---------+ 
|1  |0040026|CCS |0  |test   |9/12/2006| 
+------+-------+------+------+-------------+---------+ 
|2  |0040026|CCS |1  |test   |9/12/2006| 
+------+-------+------+------+-------------+---------+ 
|3  |0040026|CCS |2  |test   |9/12/2006| 
+------+-------+------+------+-------------+---------+ 
|4  |0040026|CCS |3  |test   |9/12/2010| 
+------+-------+------+------+-------------+---------+ 
|5  |2000010|CCS |0  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|6  |2000010|CCS |1  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|7  |2000010|CCS |2  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|8  |2000010|CCS |3  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|9  |2000010|CCS |4  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|10 |2000010|CCS |5  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|11 |2000010|CCS |6  |test   |7/28/2013| 
+------+-------+------+------+-------------+---------+ 
|12 |2000025|CCS |0  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|13 |2000025|CCS |1  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|14 |2000025|CCS |2  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|15 |2000025|CCS |3  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 
|16 |2000025|CCS |4  |test   |1/1/1753 | 
+------+-------+------+------+-------------+---------+ 

Answer 1

왜 INNER JOIN에서 그 설명 테이블을 사용하지 않습니까? 좋아요

SELECT TOP 100 
     ROW_NUMBER() OVER (ORDER BY LTRIM(VW_POLINDEX.SYMBOL) ASC, LTRIM(VW_POLINDEX.POLNUM) ASC, LTRIM(VW_POLINDEX.MODULE) ASC) AS RowNum 
     ,VW_POLINDEX.POLNUM 
     ,VW_POLINDEX.SYMBOL 
     ,VW_POLINDEX.MODULE 
     ,VW_POLINDEX.CANCELLD 
     ,SH.reasonamendedCd 
FROM VW_POLINDEX WITH (NOLOCK) 
     INNER JOIN LINE_OF_BUS_LIT WITH (NOLOCK) ON VW_POLINDEX.LOB = LINE_OF_BUS_LIT.LOB_CD 
     INNER JOIN POL_STATUS_LIT WITH (NOLOCK) ON VW_POLINDEX.TYPEACT = POL_STATUS_LIT.POL_STATUS_CD 
     INNER JOIN SHPolicyAmendmentHistory SH ON SH.PolicyNbr = VW_POLINDEX.POLNUM 
                AND SH.PolicySymbolCd = VW_POLINDEX.SYMBOL 
                AND SH.PolicyModuleNbr = Module 
WHERE (CASE VW_POLINDEX.MODULE 
      WHEN 0 THEN VW_POLINDEX.SYMBOL + '0' 
      ELSE VW_POLINDEX.SYMBOL + '1' 
      END) NOT IN ('RJD1', 'RJH1') 
     AND VW_POLINDEX.LOB = 'HP'