Oracle 嵌套 Select returns ORA-00913 "too many values"

Question

我在将枢轴 sql 嵌套到另一个 sql 时出现 ORA-00913: "too many values" 错误。

我该如何更正这个问题，或者是否有更简单的方法来编写这个，因为我需要另一个程序的 "NEEDTHISFIELD" 字段。

SELECT null as NEEDTHISFIELD, (SELECT * FROM(
SELECT th.BUCHDAT,th.OID,th.EFTYP,ef.NAME,thp.XORDER,thp.THEVALUE
FROM THISTORY th
LEFT JOIN EFTYP ef on th.EFTYP = ef.OID
LEFT JOIN THPARA thp on th.OID = thp.THISTORY
WHERE th.EFTYP = 'xyz'
)
PIVOT (MAX(THEVALUE) FOR (XORDER) IN (
 '100' AS "VAL1",
 '101' AS "VAL2"
)))
FROM DUAL;

非常感谢！

Answer 1

您的嵌套查询 return 不止一条记录。尝试这样的事情

SELECT null as NEEDTHISFIELD,t.* FROM(
SELECT th.BUCHDAT,th.OID,th.EFTYP,ef.NAME,thp.XORDER,thp.THEVALUE
FROM THISTORY th
LEFT JOIN EFTYP ef on th.EFTYP = ef.OID
LEFT JOIN THPARA thp on th.OID = thp.THISTORY
WHERE th.EFTYP = 'xyz'
)
PIVOT (MAX(THEVALUE) FOR (XORDER) IN (
 '100' AS "VAL1",
 '101' AS "VAL2"
) t ;

Answer 2

只需为旋转 table 添加一个别名，然后您就可以将所需字段添加到所选字段列表中：

SELECT t.*,
       NULL AS NeedThisField
FROM   ( SELECT th.BUCHDAT,
                th.OID,
                th.EFTYP,
                ef.NAME,
                thp.XORDER,
                thp.THEVALUE
         FROM   THISTORY th
                LEFT JOIN EFTYP ef on th.EFTYP = ef.OID
                LEFT JOIN THPARA thp on th.OID = thp.THISTORY
         WHERE  th.EFTYP = 'xyz'
)
PIVOT (
  MAX(THEVALUE)
  FOR (XORDER) IN ( '100' AS "VAL1", '101' AS "VAL2" )
) t;

Oracle 嵌套 Select returns ORA-00913 "too many values"

Oracle Nested Select returns ORA-00913 "too many values"

sql

oracle

pivot