无法使用'更新多个列。条款

时间:2017-10-17 10:31:43

标签: oracle

我正在使用以下查询(对于一个列,即base_price工作正常)但是当我尝试更新多个列时,我得到ORA-01767:UPDATE ... SET表达式必须是子查询。

UPDATE quote_item qi
SET (qi.base_price,qi.base_cost)
  =
  ( WITH baseVersion AS
  (SELECT qi1.quote_oid, qi1.item_num, qi1.sub_item_num as sub_item_num,  q1.quote_num,  qi1.base_price,  qi1.base_cost
  FROM quote q1,
    quote_item qi1
  WHERE q1.oid         = qi1.quote_oid
  AND q1.quote_type_oid=4
  AND q1.version_num = 0
  )
SELECT bv.base_price,bv.base_cost
FROM baseVersion bv,
  quote revQuote
WHERE revQuote.oid      = qi.quote_oid
AND revQuote.quote_num  = bv.quote_num
AND qi.item_num          =bv.item_num
AND qi.sub_item_num      =bv.sub_item_num
AND revQuote.version_num >0 and revQuote.quote_type_oid=4
  )
  where qi.quote_type_oid=4;

经过一番调查后,我找到了一个解决方案,可以通过再次从with子句中选择来完成,但我无法在查询reference中实现它。

任何人都知道怎么做?

1 个答案:

答案 0 :(得分:1)

您无法从同一个子查询更新多个列。您可以将子查询重用于其他列(我不建议这样做,因为查询将执行两次),或者您可以使用oracle' s MERGE。它看起来像这样(调整它):

MERGE INTO quote_item qi
USING ( Your subquery goes here ) t
 ON(t.oid      = qi.quote_oid
    AND qi.item_num          =t.item_num
    AND qi.sub_item_num      =t.sub_item_num)
WHEN MATCHED THEN UPDATE 
     SET qi.col1 = ..,
         qi.col2 = ..