SQL Subquery in join

Question

Я изменяю существующий SQL-запрос. Проблема в том, что я хочу добавить описание из таблицы в существующие данные. Я добавил подзапрос, как показано на рисунке, но, похоже, изменил мой возвращаемый набор данных. можете anyonple предложить, как получить правильные данные с помощью подзапроса?

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' 

Токовый выход:

+------+-------+------+------+-------------+---------+ 
|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 | 
+------+-------+------+------+-------------+---------+ 

Ожидаемого результат (некоторые строки отсутствуют в выводе предыдущего, а также не сортируются после добавления подзапроса):

+------+-------+------+------+-------------+---------+ 
|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

Почему Разве вы не используете эту таблицу описания в INNER JOIN? LIKE

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'