Delete duplicate records from table in SQL Server using ROW_NUMBER()

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In this  article I will explain how to  Delete duplicate records from table in SQL Server using ROW_NUMBER().
sometimes we required to delete duplicate records from a table  .

 Suppose we have a table  with some duplicate data 
GO

 SET ANSI_NULLS ON
GO

 SET QUOTED_IDENTIFIER ON
GO

 CREATE TABLE [dbo].[tbl_Students](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NULL,
[Class] [nchar](10) NULL,
 CONSTRAINT [PK_tbl_Students] PRIMARY KEY CLUSTERED 
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

 GO


Now Create Query for delete and Excute it 


WITH Tempstudents(Name,duplicateCount)
AS
(
SELECT Name,ROW_NUMBER() OVER(PARTITION by Name ORDER BY Name) 
AS duplicateCount
FROM tbl_Students
)

DELETE FROM Tempstudents
WHERE duplicateCount > 1 

Snapshot After Excute above Query :

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