有没有办法在嵌套的 WITH 语句中包含 DELETE FROM 语句？

Question

我试图通过创建另一个 table 来删除重复项，但我无法包含 delete from 语句。我在 SQL 服务器中有代码，但我正在尝试将其转换为 Oracle。我尝试用 delete from 替换 select 但出现错误：缺少 SELECT 关键字。

代码如下：

WITH RowNumCTE AS(
SELECT t.* ,
    ROW_NUMBER() OVER (
    PARTITION BY ParcelID,
                PropertyAddress,
                SalePrice,
                SaleDate,
                LegalReference
                ORDER BY
                    UniqueID
                    ) t
                    
FROM nashvillehousing t
--Order by parcelid;
) 
SELECT *
FROM RowNumCTE
WHERE t > 1;

示例数据如下：

https://github.com/AlexTheAnalyst/PortfolioProjects/blob/main/Nashville%20Housing%20Data%20for%20Data%20Cleaning.xlsx

预期结果应该是删除了 104 个重复条目。

Answer 1

可以关联ROWID伪列：

DELETE FROM nashvillehousing
WHERE ROWID IN (
  SELECT ROWID
  FROM   (
    SELECT ROW_NUMBER() OVER (
             PARTITION BY ParcelID, PropertyAddress, SalePrice, SaleDate, LegalReference
             ORDER BY UniqueID
           ) AS rn       
    FROM nashvillehousing
  )
  WHERE  rn > 1
)

如果你真的想使用子查询分解子句（WITH）那么：

DELETE FROM nashvillehousing
WHERE ROWID IN (
  WITH sqfc (rn) AS (
    SELECT ROW_NUMBER() OVER (
             PARTITION BY ParcelID, PropertyAddress, SalePrice, SaleDate, LegalReference
             ORDER BY UniqueID
           )
    FROM nashvillehousing
  )
  SELECT ROWID
  FROM   sqfc
  WHERE  rn > 1
)

有没有办法在嵌套的 WITH 语句中包含 DELETE FROM 语句？

Is there a way to include a DELETE FROM statement in a nested WITH statement?

sql

oracle

duplicates

sql-delete