Question

我偶然解决了我的问题，但我真的想知道它为什么会起作用:)，

这就是事情：

执行以下SQL语句时出现ORA-00933: SQL command not properly ended错误：

  INSERT INTO BASP_DX.QLR@GT(BDCDYH, QSZT)
  SELECT NVL(e.BDCDYH, ' '),b.LIFECYCLE AS QSZT
  FROM DJ_DY a
    LEFT JOIN DJ_XGDJGL d
      ON d.ZSLBH = a.SLBH
    LEFT JOIN DJ_DJB e
      ON e.SLBH = d.FSLBH
        AND e.SLBH = '0123456789'
    LEFT JOIN DJ_QLRGL f
      ON f.SLBH = e.SLBH
        AND f.QLRLX = 'Person1'
    LEFT JOIN DJ_QLRGL b
      ON b.SLBH = a.SLBH
        AND (b.QLRLX = 'Person2' OR (b.QLRLX = 'Person3' AND b.QLRID = f.QLRID))
  WHERE a.SLBH = '12345'
    AND e.SLBH IS NOT NULL
    -- add the condition to ensure that 
    -- this statement and the second statement get the same result 
    AND b.QLRID IS NOT NULL
    AND (a.LIFECYCLE = '0' OR a.LIFECYCLE IS NULL);

我从原始SQL语句中删除所有不必要的插入值，相关表和条件，以专注于问题部分。

然后我谷歌，从这post我知道原因可能是：

带有ORDER BY子句或INNER JOIN的INSERT语句
带有INNER JOIN或ORDER BY子句的DELETE语句
带有INNER JOIN的UPDATE语句

显然，这些不是我的类型。我没有使用INNER JOIN和ORDER BY，我使用的都是LEFT JOIN语句，所以我想我可能是因为我用LEFT JOIN语句设置了太多条件（例如LEFT JOIN DJ_QLRGL b），所以我尝试在WHERE子句之后移动条件，它看起来像这样：

  INSERT INTO BASP_DX.QLR@GT(BDCDYH, QSZT)
  SELECT NVL(e.BDCDYH, ' '),b.LIFECYCLE AS QSZT
  FROM DJ_DY a
    LEFT JOIN DJ_XGDJGL d
      ON d.ZSLBH = a.SLBH
    LEFT JOIN DJ_DJB e
      ON e.SLBH = d.FSLBH
        AND e.SLBH = '0123456789'
    LEFT JOIN DJ_QLRGL f
      ON f.SLBH = e.SLBH
        AND f.QLRLX = 'Person1'
    LEFT JOIN DJ_QLRGL b
      ON b.SLBH = a.SLBH
    -- this conditions move to WHERE clause
  WHERE a.SLBH = '12345'
    AND e.SLBH IS NOT NULL
    -- here is the original LEFT JOIN condition
    AND (b.QLRLX = 'Person2' OR (b.QLRLX = 'Person3' AND b.QLRID = f.QLRID))
    AND (a.LIFECYCLE = '0' OR a.LIFECYCLE IS NULL);

然后它的作品！但为什么呢？

我只是想知道这种情况的原因。

Solution

问题是三角形连接，LEFT JOIN条件不能包含有关自连接表的条件，在这种情况下，它是b.QLRID = f.QLRID，所以当我删除b.QLRID = f.QLRID条件时，它的工作原理。

Answer 1

首先，“DJ_QLRGL b”的连接不再是LEFT，如何WHERE条件排除没有找到b对应的行

ORA-00933：使用INSERT INTO ... SELECT语句未正确结束SQL命令

1 个答案: