查找缺失行的 SQL 查询返回语法错误

Posted 2023-05-07

【中文标题】查找缺失行的 SQL 查询返回语法错误

【英文标题】：SQL Query to find missing rows returns syntax error

【发布时间】：2016-02-23 07:57:41

【问题描述】：

我尝试从两个向量中过滤缺失值。我尝试比较两个分别运行良好的查询。但是，将它们放在一起时，我似乎错过了一些东西：

SELECT ID_Name FROM [000_Skalar_Daten] 
 WHERE VertragsPool       = 'Bestand' 
   AND Bilanzstichtag       = '20151231' 
   AND VR_Key               = '34' 
   AND Waehrung             = 'EUR' 
   AND SII_LINE_OF_BUSINESS = 'KLV' 
 WHERE ID_Name NOT IN (
      SELECT  distinct VD.ID_Name   
        FROM [000_Vektor_Daten] VD 
  INNER JOIN [000_Skalar_Daten] SD 
          ON VD.VertragsPool = SD.VertragsPool   
         AND VD.ID_Name = SD.ID_Name   
         AND VD.Bilanzstichtag = SD.Bilanzstichtag   
         AND VD.VR_Key = SD.VR_Key   
         AND VD.Waehrung  = SD.Waehrung   
       WHERE SD.VertragsPool       = 'Bestand' 
         AND SD.Bilanzstichtag       = '20151231' 
         AND SD.VR_Key               = '34' 
         AND SD.Waehrung             ='EUR' 
         AND SD.SII_LINE_OF_BUSINESS ='KLV'
    )

在WHERE 子句附近返回语法错误。我的问题是如何重组查询以仅返回不在第二个查询部分中的值。也许我通过 MS Access 中的 pass-through-query 将此查询传递给 Microsoft SQL-Server 是相关的。

非常感谢！

【问题讨论】：

将第二个WHERE 替换为AND。

另外，子查询中不需要SELECT DISTINCT。

【参考方案1】：

错误的原因已经在 cmets 中提到过。这是编写查询的更好方法，它处理来自Sub-Query 的NULL 值

SELECT ID_Name
FROM   [000_Skalar_Daten] a
WHERE  VertragsPool = 'Bestand'
       AND Bilanzstichtag = '20151231'
       AND VR_Key = '34'
       AND Waehrung = 'EUR'
       AND SII_LINE_OF_BUSINESS = 'KLV'
       AND NOT EXISTS (SELECT 1
                       FROM   [000_Vektor_Daten] VD
                              INNER JOIN [000_Skalar_Daten] SD
                                      ON VD.VertragsPool = SD.VertragsPool
                                         AND VD.ID_Name = SD.ID_Name
                                         AND VD.Bilanzstichtag = SD.Bilanzstichtag
                                         AND VD.VR_Key = SD.VR_Key
                                         AND VD.Waehrung = SD.Waehrung
                       WHERE  SD.VertragsPool = 'Bestand'
                              AND SD.Bilanzstichtag = '20151231'
                              AND SD.VR_Key = '34'
                              AND SD.Waehrung = 'EUR'
                              AND SD.SII_LINE_OF_BUSINESS = 'KLV'
                              AND a.ID_Name = VD.ID_Name)