Question

出于某种原因，以下查询仅返回第一个查询的总和（金额），而不是第一个总和（金额）与第二个总和（金额）之间的预期差。

select sum(amount) from(
SELECT  
        UNIQUE_MEM_ID ,
        Amount

FROM    yi_fourmpanel.card_panel
WHERE (DESCRIPTION iLIKE '%some criteria%')


GROUP BY 
         UNIQUE_MEM_ID ,
         Amount)

    minus

select sum(amount) from(
SELECT  
        UNIQUE_MEM_ID ,
        Amount

FROM    yi_fourmpanel.card_panel
WHERE (DESCRIPTION iLIKE '%some criteria%')

AND is_duplicate!=1
AND amount >0
AND currency_id = 152
AND transaction_base_type = 'debit'

GROUP BY 
         UNIQUE_MEM_ID ,
         Amount)

Answer 1

MINUS/EXCEPT是基于运算符而非算术运算符设置的。我想你想要类似的东西：

WITH cte AS (
  SELECT  UNIQUE_MEM_ID ,  Amount
  FROM    yi_fourmpanel.card_panel
  WHERE (DESCRIPTION iLIKE '%some criteria%')
    AND transaction_base_type <> 'debit'
  UNION ALL
  SELECT  UNIQUE_MEM_ID ,  -Amount
  FROM    yi_fourmpanel.card_panel
  WHERE (DESCRIPTION iLIKE '%some criteria%')
    AND is_duplicate!=1
    AND amount >0
    AND currency_id = 152
    AND transaction_base_type = 'debit'
)
SELECT UNIQUE_MEM_ID, SUM(Amount) AS total
FROM cte
GROUP BY UNIQUE_MEM_ID

如何正确使用减号运算符？

1 个答案: