Reset Identity Column In SQL

Create table emp:

CREATE TABLE [dbo].[emp](
[id] [int] IDENTITY(1,1) NOT NULL,
[name] [varchar](50) NULL,
[city] [varchar](50) NULL,
[Mobile] [varchar](50) NULL,
CONSTRAINT [PK_emp] 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

Insert Data into emp table:

insert into emp (id,name,city,Mobile) values(1,'Vikram','Pune','0123456789')
insert into emp (id,name,city,Mobile) values(2,'vishal','Omerga','9921319080')
insert into emp (id,name,city,Mobile) values(3,'Sunil','PPur','8855663322')
insert into emp (id,name,city,Mobile) values(4,'vishu','Latur','7208009080')

Show Result as:



Then delete record where id=2 and result is:

delete from emp where id=2;

Show deleted Result as:



Again, insert data into emp table where id=2 then:

set identity_insert emp on
insert into emp (id,name,city,Mobile) values(2,'Vaibhav','Osmanabad','9580256630')
set identity_insert emp off

Show result as: