SQL 多个共享 WHERE 条件

Question

我正试图找到一种好的、高效的方式来运行这样的查询:

SELECT *
  FROM tableA a
 WHERE    a.manager IN (    SELECT id
                                 FROM tableB b
                           CONNECT BY PRIOR b.id = b.manager_id
                           START WITH b.id = 'managerBob')
       OR a.teamLead IN (    SELECT ID
                               FROM tableB b
                         CONNECT BY PRIOR b.ID = b.manager_id
                         START WITH b.ID = 'managerBob')
       OR a.creator IN (    SELECT id
                              FROM tableB b
                        CONNECT BY PRIOR b.id = b.manager_id
                        START WITH b.id = 'managerBob')

如您所见，我尝试使用多个 WHERE 子句，但每个子句都使用等式右侧的相同数据集。如果我使用多个子句，它似乎运行得非常慢，我很确定这是因为 Oracle 正在运行每个子查询。有没有办法让这样的东西工作？

SELECT *
  FROM tableA a
 WHERE    a.manager, 
          a.teamLead, 
          a.creator in (    SELECT id
                                 FROM tableB b
                           CONNECT BY PRIOR b.id = b.manager_id
                           START WITH b.id = 'managerBob')

顺便说一句，很抱歉，如果这是我可以用 Google 搜索的内容，我不确定该怎么调用它。

Answer 1

Subquery factoring可能有帮助:

WITH people AS
(    SELECT id
       FROM tableB b
    CONNECT BY PRIOR b.id = b.manager_id
      START WITH b.id = 'managerBob'
)
SELECT *
  FROM tableA a
 WHERE    a.manager IN (SELECT id FROM people)
       OR a.teamLead IN (SELECT id FROM people)
       OR a.creator IN (SELECT id FROM people)