Identity column in SQL Server
This is only for identity coloum Create Table tblPerson ( PersonId int Identity(1,1) Primary Key, Name nvarchar(20) ) Insert into tblPerson values ('Sam') Insert into tblPerson values ('Sara') Insert into tblPerson values ('Todd') where personid=2 select * from tblperson Insert into tblPerson(PersonId, Name) values(2, 'John') delete tblPerson where personid=2 SET Identity_Insert tblPerson ON --suppose we have deleted any in between the table and we try to insert the row but it can be inserted by this querry we inserted the row SET Identity_Insert tblPerson OFF --after modification we need to again resert the identity insert.. DBCC CHECKIDENT(tblPerson, RESEED, 0)-- if we want to completely delete our table and start is agiin from the person id =1 the we should use this querry
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