Question

在Db2中运行相同的查询，但在oracle中它给出了错误。请帮忙。提前谢谢。

delete from  (SELECT   
     EMP_ID,
     SAL,
     ROW_NUMBER() OVER (PARTITION BY EMP_ID ORDER BY SAL DESC) As RN
FROM     FPM.FACT_PL_BS
WHERE    MEASUREMENT_PERIOD_ID=20170811
AND      SCENARIO_ID=1) A where RN>1}

Answer 1

检查文档Notes on Updatable Views：

视图不得包含以下任何构造：


设置运算符

DISTINCT运算符

汇总或分析功能

GROUP BY，ORDER BY，MODEL，CONNECT BY或START WITH子句

SELECT列表中的集合表达式

SELECT列表中的子查询

指定为WITH READ ONLY的子查询

加入，但有一些例外情况，如“Oracle数据库管理员指南”中所述。

ROW_NUMBER是Analytic Function，因此不允许更新。

我认为这个应该有效（未经测试）：

delete from FPM.FACT_PL_BS
WHERE ROWID =ANY 
(SELECT   ROW_ID 
FROM 
   (SELECT ROWID as ROW_ID,
     EMP_ID,
     SAL,
     ROW_NUMBER() OVER (PARTITION BY EMP_ID ORDER BY SAL DESC) As RN
   FROM     FPM.FACT_PL_BS
   WHERE    MEASUREMENT_PERIOD_ID=20170811
      AND      SCENARIO_ID=1)
WHERE RN > 1;

或者

delete from FPM.FACT_PL_BS
WHERE MEASUREMENT_PERIOD_ID=20170811
   AND SCENARIO_ID=1
   AND ROWID <>ALL 
      (select MAX(ROWID) KEEP (DENSE_RANK FIRST ORDER BY SAL) OVER (PARTITION BY EMP_ID)
       FROM FPM.FACT_PL_BS)

从oracle中的表中删除时出现错误“ORA-01732：数据操作操作在此视图上不合法”

1 个答案: