how to reset the identity column in sql server
snippet in sql

tsql reseed identity

user134

USE AdventureWorks2012;  
GO  
DBCC CHECKIDENT ('Person.AddressType', RESEED, 10);  
GO  

how to reset the identity column in sql server

user9804

USE <databasename>;  
GO  
DBCC CHECKIDENT ('<tablename>.<columnname>', <value>, <incrementby>);  
GO 

reseed sql table primary key

user1259

DBCC CHECKIDENT ('YourTableName', RESEED, 1)