Question

我正在努力将存储过程从SQL转换为Oracle，我收到此错误：

ORA-01427：单行子查询返回多行 ORA-06512：在“CMIUSER.PROCEDURE3”，第21行 ORA-06512：第7行

t_name_match和t_descript_match是全局临时表。

有人可以向我解释我做错了什么吗？

Class2

Answer 1

你有“单行子查询”的唯一地方（我注意到）是：

UPDATE  t_name_match nm
    SET nm.DESCRIPT = (SELECT x.DESCRIPT
                       from  CHAR_FEATURE_XRF x
                       where x.KBID = nm.KBID and x.SYMBOLID = nm.SYMBOLID
                      );

如何修复它取决于您想要做什么。两种简单的方法是MAX()和rownum = 1：

UPDATE  t_name_match nm
    SET nm.DESCRIPT = (SELECT MAX(x.DESCRIPT)
                       from  CHAR_FEATURE_XRF x
                       where x.KBID = nm.KBID and x.SYMBOLID = nm.SYMBOLID
                      );

UPDATE  t_name_match nm
    SET nm.DESCRIPT = (SELECT x.DESCRIPT
                       from  CHAR_FEATURE_XRF x
                       where x.KBID = nm.KBID and x.SYMBOLID = nm.SYMBOLID and
                             rownum = 1
                      );

编辑：

哦，我看到有两个地方。另一个是：

UPDATE t_descript_match dm
    SET dm.FEATURENAME = (SELECT f.FEATURENAME
                          from  FEATURE_MASTER f
                          where f.KBID = dm.KBID and f.SYMBOLID = dm.SYMBOLID
                         );

你会以同样的方式修复它。

Answer 2

    UPDATE  t_name_match nm
    SET nm.DESCRIPT = (SELECT x.DESCRIPT
    from  CHAR_FEATURE_XRF    x
    where x.KBID = nm.KBID
    and x.SYMBOLID = nm.SYMBOLID group by x.DESCRIPT);


    UPDATE  t_descript_match dm
    SET dm.FEATURENAME = (SELECT f.FEATURENAME
    from  FEATURE_MASTER      f
    where f.KBID = dm.KBID
    and f.SYMBOLID = dm.SYMBOLID group by f.FEATURENAME);

你可以尝试这些并检查。

如何修复ORA-01427

2 个答案: