PL/SQL INSERT语句的子查询使用别名和功能

Question

我是很新，PL/SQL，但我想知道是否有一种方式来实现以下目标：

INSERT INTO aTable (
    SELECT FN_TO_VALUE(b.field1, b.field2, b.field3) as alias1, 
      FN_TO_VALUE(b.field1, b.field2, b.field3) as alias2, 
      FN_TO_VALUE(b.field1, b.field2, b.field3) as alias3, 
      c.field1, c.field2 
    FROM bTable b, cTable c 
    WHERE b.alias1= c.field3 
    ); 

鉴于FN_TO_VALUE是一个函数，它返回将在aTable中的相应数据类型。

我收到以下错误语句：

PL/SQL : SQL Statement ignored (that's located at the INSERT INTO line) 
PL/SQL : ORA-00904: "B"."ALIAS1" invalid identifier 

勘误表：

• 我不得不修改where子句从WHERE b.alias1 = c.field1到其中B .alias1 = c.field3，因为@Bob Jarvis提供的解决方案之一不会考虑链接表bTable和cTable可能需要的其他字段。

SOLUTION：

• 我都选择了以下解决方案：

  INSERT INTO aTable (
      SELECT b.alias1, 
        b.alias2, 
        b.alias3, 
        c.field1, 
        c.field2 
      FROM cTable c, 
      (
      SELECT FN_TO_VALUE (field1, field2, field3) AS alias1, 
        FN_TO_VALUE (field1, field2, field3) AS alias2, 
        FN_TO_VALUE (field1, field2, field3) AS alias3 
      FROM bTable 
      ) b 
      WHERE b.alias1 = c.field3 
  ); 
  

Answer 1

INSERT INTO aTable (
SELECT inner.alias1, 
     inner.alias2, 
     inner.alias3, 
     inner.field1, 
     inner.field2 
    FROM (SELECT FN_TO_VALUE (b.field1, b.field2, b.field3) AS alias1, 
       FN_TO_VALUE (b.field1, b.field2, b.field3) AS alias2, 
       FN_TO_VALUE (b.field1, b.field2, b.field3) AS alias3, 
       c.field1, 
       c.field2 
      FROM bTable b, cTable c 
     ) inner 
WHERE inner.alias1 = inner.field1 
) 

OR

INSERT INTO aTable (
SELECT FN_TO_VALUE (b.field1, b.field2, b.field3) AS alias1, 
     FN_TO_VALUE (b.field1, b.field2, b.field3) AS alias2, 
     FN_TO_VALUE (b.field1, b.field2, b.field3) AS alias3, 
     c.field1, 
     c.field2 
    FROM bTable b, cTable c 
WHERE FN_TO_VALUE (b.field1, b.field2, b.field3) = c.field1 
    );