sql - 更改子查询以加入 Oracle 视图中的两列

Question

我正在使用 5 个 SELECT（UNION-ed）扩展现有视图，该视图在其中一个 WHERE 子句中有一个子查询。

现在需要在所有 SELECT 语句中访问该子查询中使用的表，所以我想加入它（在此处进行一些研究之后:)）。

现在的形式是这样的（简体）

SELECT DISTINCT 
    ...
FROM 
    PERSON ,
    ADDRESS ,
    OWNER ,
    OBJECT
WHERE 
    PERSON.PERSONID = ADDRESS.PERSONID
    AND PERSON.PERSONID = OWNER.PERSONID (+)
    AND OWNER.OBJECTID = OBJECT.OBJECTID
    AND
    (
       OBJECT.REG_REQUIRED NOT in
       (
          'Y'
       )
       OR
       (
          OBJECT.REG_REQUIRED in ('Y')
          AND OWNER.PERSONID || OWNER.OBJECTID IN
          (
             SELECT
             REG.PERSONID || REG.OBJECTID
             FROM REGISTRATIONS REG
             WHERE APPROVED IN ('Y','V')
          )
       )
    )

连接需要考虑到子查询中有串联的事实：

SELECT DISTINCT 
    ...
FROM 
    PERSON ,
    ADDRESS ,
    OWNER ,
    OBJECT ,
    REGISTRATIONS REG
WHERE 
    PERSON.PERSONID = ADDRESS.PERSONID
    AND PERSON.PERSONID = OWNER.PERSONID (+)
    AND OWNER.OBJECTID = OBJECT.OBJECTID
    AND 
    (
       OBJECT.REG_REQUIRED NOT in
       (
          'Y'
       )
       OR
       (
          OBJECT.REG_REQUIRED in ('Y')
          AND (( OWNER.PERSONID || OWNER.OBJECTID = REG.PERSONID || REG.OBJECTID ) AND REG.APPROVED IN ('Y','V'))
       )
    )

我这样做对吗？

Answer 1

经过更多研究，我认为连接可以/应该与子查询的其余条件分开，如下所示：

SELECT DISTINCT 
    ...
FROM 
    PERSON ,
    ADDRESS ,
    OWNER ,
    OBJECT ,
    REGISTRATIONS REG
WHERE 
    PERSON.PERSONID = ADDRESS.PERSONID
    AND PERSON.PERSONID = OWNER.PERSONID (+)
    AND OWNER.OBJECTID = OBJECT.OBJECTID
    AND OWNER.OBJECTID = OBJECT.OBJECTID
    AND OWNER.PERSONID || OWNER.OBJECTID = REG.PERSONID (+) || REG.OBJECTID (+)
    AND
    (
       OBJECT.REG_REQUIRED NOT in
       (
          'Y'
       )
       OR
       (
          REG.APPROVED IN ('Y','V'))
       )
    )