从SELECT查询创建UPDATE，包括检索多个列的子查询

Question

我有以下SELECT查询：

SELECT
    T3.EPSINO AS FaktNr, 
    T3.EPDIVI AS Div, 
    T3.EPSUNO AS Lev,
    T3.EPPYME AS BetMet,
    T2.Summa AS Belopp
FROM 
    M3EDBPTS.FPLEDG T3
JOIN 
    (SELECT 
         T1.EPCONO, T1.EPSINO, 
         T1.EPDIVI, T1.EPSUNO,
         SUM(T1.EPCUAM) AS Summa
     FROM 
         M3EDBPTS.FPLEDG T1
     WHERE 
         T1.EPCONO = 001 AND
         T1.EPDIVI = '500' AND
         T1.EPSUNO = '73823'
     GROUP BY 
         T1.EPCONO,T1.EPDIVI, T1.EPSUNO, T1.EPSINO
     HAVING 
         (SUM(T1.EPCUAM) <> 0)) AS T2 ON T3.EPCONO = T2.EPCONO 
                                      AND T3.EPDIVI = T2.EPDIVI 
                                      AND T3.EPSINO = T2.EPSINO 
                                      AND T3.EPSUNO = T2.EPSUNO

WHERE 
    T3.EPPYME IN ('KOT', 'ULK')

如何创建脚本来更新我得到的结果？我试着写：

    UPDATE T3
    SET T3.EPPYME = 'SEP'
    FROM M3EDBPTS.FPLEDG T3
    JOIN (SELECT 
              T1.EPCONO, T1.EPSINO, T1.EPDIVI, T1.EPSUNO,
              SUM(T1.EPCUAM) AS Summa
          FROM M3EDBPTS.FPLEDG T1
          WHERE T1.EPCONO = 001 AND T1.EPDIVI = '500' AND
                T1.EPSUNO = '73823' 
          GROUP BY T1.EPCONO, T1.EPDIVI, T1.EPSUNO, T1.EPSINO
          HAVING (SUM(T1.EPCUAM) <> 0)) AS T2 ON T3.EPCONO = T2.EPCONO 
                                              AND T3.EPDIVI = T2.EPDIVI 
                                              AND T3.EPSINO = T2.EPSINO 
                                              AND T3.EPSUNO = T2.EPSUNO
    WHERE 
        T3.EPPYME IN ('KOT','ULK')

但我只收到错误：

  

SQL0199 - 未预期的关键字FROM。有效代币：使用SKIP WAIT WITH WHERE。

语法错误怎么办？

示例DB-table FPLEDG：

FPLEDG

Answer 1

    UPDATE M3EDBPTS.FPLEDG T3
    SET T3.EPPYME = 'SEP'
    WHERE T3.EPPYME IN ('KOT', 'ULK')
      AND EXISTS (
          SELECT 
              T1.EPCONO, T1.EPSINO, T1.EPDIVI, T1.EPSUNO,
              SUM(T1.EPCUAM) AS Summa
          FROM M3EDBPTS.FPLEDG T1
          WHERE T1.EPCONO = 001 AND T1.EPDIVI = '500' AND
                T1.EPSUNO = '73823' AND
                T3.EPCONO = T1.EPCONO AND
                T3.EPDIVI = T1.EPDIVI AND
                T3.EPSINO = T1.EPSINO AND
                T3.EPSUNO = T1.EPSUNO         
          GROUP BY T1.EPCONO, T1.EPDIVI, T1.EPSUNO, T1.EPSINO
          HAVING (SUM(T1.EPCUAM) <> 0))

这将是攻击的一般计划，但由于我不知道您的数据模型，您将不得不测试它并查看子选择是否正确。