How to use Self Join in SQL Server

SELF JOIN for use same table join, in some business logic want some result by same table but with condition that time we use this.

Follow Steps: 

--1.Creating the Employee table 

CREATE TABLE Emp(emp_id int, manger_id int,employee_name varchar(20))

--2.Inserting the value 

INSERT INTO Emp VALUES(1,1,'T1'),(2,1,'T2'),(3,2,'T3'),(4,1,'T4')

--3.The self join query 

SELECT emp.emp_id,emp.employee_name [Emb], mgr.employee_name [Manager] FROM Emp, Emp mgr WHERE emp.manger_id = mgr.emp_id