Question

我有以下两个表：津贴和范围。 ALLOWANCE具有键列AllowanceID并且对应于每个AllowanceID，将有许多RANGE条目。 Range有一个名为RangeID的主键和一个AllowanceID引用。除此之外，它还有以下几列。

RANGESTART
RANGEEND
POUNDS
SUM

现在，我想写一个查询来匹配两个AllowanceID的范围。即，给定SorceAllowanceID和TargetAllowanceID，我想匹配范围的数量以及源的目标范围值。所以我有以下查询（我这里只使用一列），后跟一个INSERT语句（此处未显示），

UPDATE    
( 
   SELECT 
          src.pounds AS src_pounds ,      
          tgt.pounds AS tgt_pounds     
   FROM     
       (
          SELECT  rank() OVER (PARTITION BY PR.ALLOWANCEID ORDER BY PR.RANGESTART)  RN
                  ,PR.* 
         FROM RANGES PR 
         WHERE PR.ALLOWANCEID=sourceallowanceid 
         ORDER BY PR.RANGESTART) src ,
        (SELECT  rank() OVER (PARTITION BY PR.ALLOWANCEID ORDER BY PR.RANGESTART)  PN
           ,PR.* 
         FROM ranges PR 
         WHERE PR.aLLOWANCEID=targetallowanceid 
        ORDER BY PR.RANGESTART) TGT
    WHERE  src.Rn=tgt.PN
)
SET tgt_pounds = src_pounds;

但这引起了ORA-01779。然后我尝试使用MERGE语句

MERGE INTO 
  (   
  SELECT  rank() OVER (PARTITION BY PR.ALLOWANCEID ORDER BY PR.RANGESTART)  PN
       ,PR.* 
   FROM     RANGES PR 
   WHERE PR.ALLOWANCEID=targetallowanceid 
   ORDER BY PR.RANGESTART) tgt    
USING (SELECT  rank() OVER (PARTITION BY PR.ALLOWANCEID ORDER BY PR.RANGESTART)  RN
     ,PR.* 
   FROM RANGES PR 
   WHERE PR.ALLOWANCEID=sourceallowanceid 
  ORDER BY PR.RANGESTART) src   
 ON  ( src.RN = tgt.PN )
 WHEN MATCHED
    THEN
       UPDATE
       SET   tgt.pounds = src.pounds
WHEN NOT MATCHED THEN
    --Insert

抛出了ORA-00903。

请指导我如何为此编写查询。

感谢大家，

与Pradeep

Answer 1

我不相信你可以合并到一个子查询中，这就是为什么你得到ORA-00903：无效的表名。但是，您可以将该子查询更改为视图，它应该可以工作。试试这个，例如：

CREATE VIEW sub-query subqview as
   SELECT  rank() OVER (PARTITION BY PR.ALLOWANCEID ORDER BY PR.RANGESTART)  PN
       ,PR.* 
   FROM     RANGES PR 
   WHERE PR.ALLOWANCEID=targetallowanceid 
   ORDER BY PR.RANGESTART;

MERGE INTO subqview tgt    
USING (SELECT  rank() OVER (PARTITION BY PR.ALLOWANCEID ORDER BY PR.RANGESTART)  RN
     ,PR.* 
   FROM RANGES PR 
   WHERE PR.ALLOWANCEID=sourceallowanceid 
  ORDER BY PR.RANGESTART) src   
 ON  ( src.RN = tgt.PN )
 WHEN MATCHED
    THEN
       UPDATE
       SET   tgt.pounds = src.pounds
WHEN NOT MATCHED THEN
    --Insert

UPSERT在同一张桌子里

1 个答案: