如何按 SQL 中的行号删除

Question

我需要从第 475 行到第 948 行删除，因为它们与第 1-474 行重复。我想它应该接近于此，或者还有更多？

DELETE FROM dbo.industry WHERE row_number between 475 and 948

Answer 1

SELECT DISTINCT *
INTO #Temp
FROM dbo.industry

DELETE FROM dbo.industry

INSERT INTO dbo.industry
SELECT *
FROM #Temp

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 table 的任何列名称。

Answer 3

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 4

这不是真正的答案。数据存在一些问题，使上述答案（虽然很好）无关。我只是删除了 table 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

可能为时已晚，但我通常这样做

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

Answer 6

如果您尝试使用 Row_Number 函数进行删除，并且出现

错误

Windowed functions can only appear in the SELECT or ORDER BY clauses

您可以修改 SQL 以将其包含在 select 子句中，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

Answer 7

ALTER TABLE dbo.industryADD COLUMN tmpRowNumber COUNTER
DELETE * FROM dbo.industry WHERE tmpRowNumber IS BETWEEN 475 AND 948
ALTER TABLE dbo.industry DROP COLUMN tmpRowNumber

不过要小心，您的 DBS 可能不会将第 1 行视为第 1 行，因为表格未排序

如何按 SQL 中的行号删除

How to delete by row number in SQL

ssms

sql-delete