You can generate sequence using identity function.
ex1)
CREATE TABLE new_employees
(
id_num int IDENTITY(1,1),
fname varchar (20),
minit char(1),
lname varchar(30)
)
ex2)
SELECT emp_id AS emp_num,
fname AS first,
minit AS middle,
lname AS last,
IDENTITY(smallint, 100, 1) AS...