ORA-00913: oracle 子查询中的值太多

Posted 2023-05-09

【中文标题】ORA-00913: oracle 子查询中的值太多

【英文标题】：ORA-00913: too many values in oracle subquery

【发布时间】：2018-08-29 16:22:33

【问题描述】：

我需要获取所有提供给候选人的工作机会，以及候选人最终被聘用的职位。我创建了两个单独的查询，一个捕获所有报价，一个子查询仅捕获每个候选人最终被聘用的工作。当我结合两个查询时出现问题，我得到 ORA-00913: too many values。有什么建议吗？

SELECT DISTINCT h.pi_candidate_num,
                h.parent_pi_number,
                h.associate_name,
                j.job_family_name,
                j.organization_name,
                j.title,
                e.contest_number,
                e.pi_his_itm_app_trk_creation_dt offer_date
FROM   wc_hired_interns_fa h
INNER  JOIN wc_application_event_f e
ON     h.pi_candidate_num = e.pi_candidate_num
INNER  JOIN wc_job_information_d j
ON     e.job_info_row_wid = j.row_wid
WHERE  e.pi_his_itm_app_trk_creation_dt IN
       (SELECT DISTINCT e.pi_his_itm_app_trk_creation_dt
        FROM   wc_application_event_f e
        INNER  JOIN wc_hired_interns_fa h
        ON     h.pi_candidate_num = e.pi_candidate_num
        INNER  JOIN wc_job_information_d j
        ON     e.job_info_row_wid = j.row_wid
        WHERE  j.job_family_name IN ('MDP', 'ELP', 'Emerging Leader Program', 'Other')
        AND    e.pi_his_itm_app_trk_sts_name = 'Extended'
        AND    e.pi_his_itm_app_trk_step_name = 'Offer'
        AND    j.title NOT IN ('Student Ambassador Program for Eligible Summer Interns', 'Student Ambassador'))
AND    j.title IN (SELECT *
                   FROM   (SELECT DISTINCT j.title full_time_detail,
                                           rank() over(PARTITION BY e.pi_candidate_num ORDER BY e.pi_his_itm_app_trk_creation_dt DESC) AS rowrank
                           FROM   wc_hired_interns_fa h
                           INNER  JOIN wc_application_event_f e
                           ON     h.pi_candidate_num = e.pi_candidate_num
                           INNER  JOIN wc_job_information_d j
                           ON     e.job_info_row_wid = j.row_wid
                           AND    j.job_family_name IN ('MDP', 'ELP', 'Emerging Leader Program', 'Other')
                           AND    e.pi_his_itm_app_trk_sts_name = 'Hired - External'
                           AND    e.pi_his_itm_app_trk_step_name = 'Hire'
                           AND    j.title NOT IN ('Student Ambassador Program for Eligible Summer Interns', 'Student Ambassador'))
                   WHERE  rowrank = 1);

【参考方案1】：

当前的问题似乎是这部分：

...
  AND J.TITLE IN (
    SELECT * FROM (
      SELECT DISTINCT J.TITLE FULL_TIME_DETAIL,
        RANK () OVER (PARTITION BY E.PI_CANDIDATE_NUM ORDER BY E.PI_HIS_ITM_APP_TRK_CREATION_DT DESC) AS ROWRANK 
        FROM WC_HIRED_INTERNS_FA H
...

SELECT * 表示子查询返回两个列值，FULL_TIME_DETAIL 和 ROWRANK。不过，您实际上并不想要 ROWRANK，因此请将 * 更改为您想要的列：

...
  AND J.TITLE IN (
    SELECT FULL_TIME_DETAIL FROM (
      SELECT DISTINCT J.TITLE FULL_TIME_DETAIL,
        RANK () OVER (PARTITION BY E.PI_CANDIDATE_NUM ORDER BY E.PI_HIS_ITM_APP_TRK_CREATION_DT DESC) AS ROWRANK 
        FROM WC_HIRED_INTERNS_FA H
...

---

您正在执行大量子查询并重复大量代码，因此这可能会大大简化；也许研究分析函数。不过，这超出了这个问题和具体错误的范围。

【讨论】：

感谢您的建议，但是在进行了您推荐的更改后，即使错误清除了，我也没有得到预期的结果，这是某人被雇用的职位。

就像我说的，这超出了这个问题的范围。正如我认为我对上一个问题的评论，您确实需要提供an MCVE 并准确解释您想要看到的内容，以及为什么您当前的代码没有按照您的意愿执行。不过，这将是另一个新问题。不过，我会暗示，您的子查询可能需要连接（或消除），并且您可以使用案例表达式和分析函数来更接近我认为您的目标；所以你可能应该探索这条路，然后在遇到困难时提出一个新问题。