如何在SQL中按行号删除

Question

我需要从行号475到948删除，因为它们是行1-474的重复。我猜想，它会接近这个，还是还有更多呢？

DELETE FROM dbo.industry WHERE row_number between 475 and 948

Answer 1

可能为时已晚，但我通常会这样做

; with cte(rownum)as(
    select row_number () over(partition by [Col1], [Col2] order by Col3) from [table]
)
delete from cte where rownum > 1

Answer 2

DELETE FROM dbo.industry
WHERE COLUMN_NAME IN      -- Choose a column name
  (SELECT TOP 1000
     COLUMN_NAME,          -- Choose a column name
     ROW_NUMBER() OVER( ORDER by COLUMN_NAME ASC) AS Row_Number
   FROM dbo.industry
   WHERE Row_Number BETWEEN 475 AND 948 )

COLUMN_NAME可以是您想要的表格的任何列名称。

Answer 3

SELECT DISTINCT *
INTO #Temp
FROM dbo.industry

DELETE FROM dbo.industry

INSERT INTO dbo.industry
SELECT *
FROM #Temp

Answer 4

这不是一个真正的答案。数据存在一些问题，使得上面的答案（虽然优秀）无关。我只是删除了表，然后从固定宽度重新导入它。这一次，我更加小心，没有重复。

Answer 5

DELETE FROM dbo.industry WHERE dbo.industry.
REPLACE WITH PK COLUMN NAME| IN (SELECT TOP 948 dbo.industry
REPLACE WITH  PK COLUMN NAME| FROM dbo.industry WHERE dbo.industry
REPLACE WITH  PK COLUMN NAME| > 475 ORDER BY dbo.industry 
REPLACE WITH  PK COLUMN NAME|)

Answer 6

如果您尝试使用Row_Number函数删除，则会收到错误

窗口函数只能出现在SELECT或ORDER BY子句中

您可以修改SQL以在select子句中使用它，如下例所示：

Delete T 
From (Select Row_Number() Over(Partition By [IndustryType], [IndustryDescription] order By [ID]) As RowNumber,* 
From dbo.industry) T
Where T.RowNumber > 1