加入的SQL子查詢

我在修改現有的SQL查詢。問題是我想從表中添加一個描述到現有數據。我添加了一個如圖所示的子查詢，但似乎改變了我的返回數據集。可以任何一個請建議如何使用子查詢獲取正確的數據？加入的SQL子查詢

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'

電流輸出：

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

預計輸出 （有些行缺少的分組輸出以及非加子查詢後排序）：

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

來源

2014-01-16 user2814819

我刪除了MySQL標記，因爲語法是SQL Server。 –

輸出不會被排序，因爲您沒有對它進行排序，所以它可以以'SQL SERVER'希望的方式返回。添加一個'ORDER BY'子句。你真的確定你想在那裏有'NOLOCK'嗎？ –

是的，輸出可以排序，但添加子查詢會給我不正確的數據，排序後也會丟失一些行。另外，我需要根據修訂日期從SHPolicyAmendmentHistory中獲得前1名，因此不確定加入是否會有所幫助，因爲它會帶來SHPolicyAmendmentHistory – user2814819

爲什麼你不使用INNER JOIN中的描述表嗎？ 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'

來源

2014-01-16 12:54:28 Mukund

中的所有列。感謝您的回覆。 SHPolicyAmendmentHistory可以返回多個列。我需要根據revisionnbr desc的順序排名前1 – user2814819

加入的SQL子查詢

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