Question

在执行此操作时，将引发抛出错误“ Missing Select Statement”。我正在尝试按照以下方案删除重复的记录。

With CTE as (
  select exrt, currencyfrom, currencyto, ratetype, year, 
    period, validfrom, factor, rate, 
    ROW_NUMBER() OVER (
      PARTITION BY exrt, currencyfrom, currencyto, 
        ratetype, year, period, validfrom, factor, rate
      ORDER BY exrt, currencyfrom, currencyto, ratetype, year, period,
        validfrom,factor,rate
    ) row_num 
  from udt_dp_exchangerate 
    where validfrom = TO_DATE('2019-SEP-28', 'YYYY-MON-DD') and period = '9'
) 
delete from cte where row_num > 1

Answer 1

您应该尝试使用以下查询而不是CTE-

DELETE FROM udt_dp_exchangerate UDE1
WHERE ROWID > (SELECT MIN(ROWID)
               FROM udt_dp_exchangerate UDE2
               WHERE UDE1.exrt = UDE2.exrt
               AND UDE1.currency = UDE2.currency
               AND UDE1.currencyto = UDE2.currencyto
               AND UDE1.ratetype = UDE2.ratetype
               AND UDE1.year = UDE2.year
               AND UDE1.period = UDE2.period
               AND UDE1.validfrom = UDE2.validfrom
               AND UDE1.factor = UDE2.factor
               AND UDE1.rate = UDE2.rate)
AND UDE1.validfrom = TO_DATE('2019-SEP-28', 'YYYY-MON-DD')
AND UDE1.period='9';

Answer 2

在oracle中，delete语句不允许CTE。

您需要尝试以下查询：

Delete from udt_dp_exchangerate
Where (rowid, 1) not in
(select rowid,
        ROW_NUMBER() OVER (PARTITION BY                     
         exrt,currencyfrom,currencyto,ratetype,year,period,validfrom,factor,rate
         ORDER BY 
         exrt,currencyfrom,currencyto,ratetype,year,period,validfrom,factor,rate
         ) row_num 
from udt_dp_exchangerate 
where validfrom = TO_DATE('2019-SEP-28', 'YYYY-MON-DD') 
  and period='9')

干杯！

查询抛出错误“缺少选择语句”

2 个答案: