Hi telldurges,
Considering that you are trying to get the records of previous month based on current year so refer below query
SQL
DECLARE @Employee AS TABLE (emp_id INT,name VARCHAR(50),sal VARCHAR(50),doj DATETIME,[address] NVARCHAR(50),mobile VARCHAR(50),DOB DATETIME,pin VARCHAR(50))
INSERT INTO @Employee VALUES(1,'Durgesh',25000,'2013-05-03','Siddharthnagar',9823434025,'1990-07-07',272207)
INSERT INTO @Employee VALUES(2,'Maneesh',30000,'2010-02-05','Naugarh',9936521044,'1993-05-01',110092)
INSERT INTO @Employee VALUES(3,'Priyanaka',55000,'1980-10-10','Deoria',9984150368,'1992-05-01',123465)
INSERT INTO @Employee VALUES(4,'Anand',35000,'2017-01-01','Bihar',8826052014,'1988-08-05',200113)
INSERT INTO @Employee VALUES(5,'Sanju',12000,'2017-01-13','Delhi',9985212366,'1985-02-05',257825)
SELECT * FROM @Employee
WHERE DATEPART(YEAR,GETDATE()) = DATEPART(YEAR,doj)
AND DATEPART(MONTH,DATEADD(MONTH,-1,GETDATE())) = DATEPART(MONTH,DATEADD(MONTH,0,doj))
Output
| emp_id | 
name | 
sal | 
doj | 
address | 
mobile | 
DOB | 
pin | 
| 4 | 
Anand | 
35000 | 
1/1/2017 | 
Bihar | 
8826052014 | 
8/5/1988  | 
200113 | 
| 5 | 
Sanju | 
12000 | 
1/13/2017  | 
Delhi | 
9985212366 | 
2/5/1985  | 
257825 |