皇冠现金app为那张表,为那张表

 

 CREATE TABLE dbo.Data
( 
    [ID] int IDENTITY(1,1) NOT NULL, 
    [Item] varchar(55) NULL,      
    [Designation] varchar(20) NULL,
    [Qty] decimal(10, 2) NULL
 ) 
 GO

Source Code

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 INSERT INTO [dbo].[Data]
 ([Item],[Designation],[Qty])  VALUES
  (N'A001',N'DES',1),
  (N'A001',N'DES',1),
  (N'A003',N'TSG',12), 
  (N'A015',N'MTT',6), 
  (N'A360',N'OSS',7), 
  (N'A360',N'OSS',7),
  (N'A360',N'OSS',7),  
  (N'A521',N'FPP',4), 
  (N'A015',N'MTT',6),
  (N'A741',N'BBS',9), 
  (N'A741',N'BBS',9), 
  (N'A003',N'TSG',12),
  (N'A015',N'MTT',6)

  GO

 

 

为那张表,添加一些数额,注意壹些多少已经再一次了:
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WITH TempData ([Item],[Designation],[Qty],[DuplicateCount])
AS
(
    SELECT [Item],[Designation],[Qty],ROW_NUMBER() OVER(PARTITION by [Item],[Designation],[Qty] ORDER BY [Item],[Designation],[Qty]) 
    AS [DuplicateCount]
    FROM [dbo].[Data]
)
SELECT * FROM TempData

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 CREATE TABLE dbo.Data
( 
    [ID] int IDENTITY(1,1) NOT NULL, 
    [Item] varchar(55) NULL,      
    [Designation] varchar(20) NULL,
    [Qty] decimal(10, 2) NULL
 ) 
 GO

 

地点只是知道怎样数据是在重新的。未来大家须求对地点的SQL语句稍改一下,把重复的记录删除:
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WITH TempData ([Item],[Designation],[Qty],[DuplicateCount])
AS
(
    SELECT [Item],[Designation],[Qty],ROW_NUMBER() OVER(PARTITION by [Item],[Designation],[Qty] ORDER BY [Item],[Designation],[Qty]) 
    AS [DuplicateCount]
    FROM [dbo].[Data]
)
--SELECT * FROM TempData
DELETE FROM TempData WHERE [DuplicateCount] > 1 
GO

SELECT [Item],[Designation],[Qty] FROM [dbo].[Data]
GO

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Source Code

Source Code

同那样的标题,使用例子来说时,最简易了。
创办一张数据表:
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同那样的标题,使用例子来说时,最简便易行了。
开创一张数据表:
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WITH TempData ([Item],[Designation],[Qty],[DuplicateCount])
AS
(
    SELECT [Item],[Designation],[Qty],ROW_NUMBER() OVER(PARTITION by [Item],[Designation],[Qty] ORDER BY [Item],[Designation],[Qty]) 
    AS [DuplicateCount]
    FROM [dbo].[Data]
)
SELECT * FROM TempData

Source Code

 INSERT INTO [dbo].[Data]
 ([Item],[Designation],[Qty])  VALUES
  (N'A001',N'DES',1),
  (N'A001',N'DES',1),
  (N'A003',N'TSG',12), 
  (N'A015',N'MTT',6), 
  (N'A360',N'OSS',7), 
  (N'A360',N'OSS',7),
  (N'A360',N'OSS',7),  
  (N'A521',N'FPP',4), 
  (N'A015',N'MTT',6),
  (N'A741',N'BBS',9), 
  (N'A741',N'BBS',9), 
  (N'A003',N'TSG',12),
  (N'A015',N'MTT',6)

  GO

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在某1数量表中,数据有冗余了,大家须要拿到唯1的记录。

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Source Code

比方数据是较高的局地本子,接下去使用ROW_NUMBEGL450()来过滤数据:
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地点只是知道怎么数据是在重新的。未来大家必要对地点的SQL语句稍改一下,把重复的记录删除:
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为那张表,添加壹些数目,注意一些数码现已再一次了:
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一经数额是较高的1些本子,接下去使用ROW_NUMBEQX56()来过滤数据:
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WITH TempData ([Item],[Designation],[Qty],[DuplicateCount])
AS
(
    SELECT [Item],[Designation],[Qty],ROW_NUMBER() OVER(PARTITION by [Item],[Designation],[Qty] ORDER BY [Item],[Designation],[Qty]) 
    AS [DuplicateCount]
    FROM [dbo].[Data]
)
--SELECT * FROM TempData
DELETE FROM TempData WHERE [DuplicateCount] > 1 
GO

SELECT [Item],[Designation],[Qty] FROM [dbo].[Data]
GO

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Source Code

在某壹数目表中,数据有冗余了,大家须要取得唯壹的笔录。

Source Code

Source Code

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