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SQL query to find employees hired in last n months

Create table Employees
(
ID int primary key identity,
FirstName nvarchar(50),
LastName nvarchar(50),
Gender nvarchar(50),
Salary int,
HireDate DateTime
)
GO

Insert into Employees values('Mark','Hastings','Male',60000,'5/10/2014')
Insert into Employees values('Steve','Pound','Male',45000,'4/20/2014')
Insert into Employees values('Ben','Hoskins','Male',70000,'4/5/2014')
Insert into Employees values('Philip','Hastings','Male',45000,'3/11/2014')
Insert into Employees values('Mary','Lambeth','Female',30000,'3/10/2014')
Insert into Employees values('Valarie','Vikings','Female',35000,'2/9/2014')
Insert into Employees values('John','Stanmore','Male',80000,'2/22/2014')
Insert into Employees values('Able','Edward','Male',5000,'1/22/2014')
Insert into Employees values('Emma','Nan','Female',5000,'1/14/2014')
Insert into Employees values('Jd','Nosin','Male',6000,'1/10/2013')
Insert into Employees values('Todd','Heir','Male',7000,'2/14/2013')
Insert into Employees values('San','Hughes','Male',7000,'3/15/2013')
Insert into Employees values('Nico','Night','Male',6500,'4/19/2013')
Insert into Employees values('Martin','Jany','Male',5500,'5/23/2013')
Insert into Employees values('Mathew','Mann','Male',4500,'6/23/2013')
Insert into Employees values('Baker','Barn','Male',3500,'7/23/2013')
Insert into Employees values('Mosin','Barn','Male',8500,'8/21/2013')
Insert into Employees values('Rachel','Aril','Female',6500,'9/14/2013')
Insert into Employees values('Pameela','Son','Female',4500,'10/14/2013')
Insert into Employees values('Thomas','Cook','Male',3500,'11/14/2013')
Insert into Employees values('Malik','Md','Male',6500,'12/14/2013')
Insert into Employees values('Josh','Anderson','Male',4900,'5/1/2014')
Insert into Employees values('Geek','Ging','Male',2600,'4/1/2014')
Insert into Employees values('Sony','Sony','Male',2900,'4/30/2014')
Insert into Employees values('Aziz','Sk','Male',3800,'3/1/2014')
Insert into Employees values('Amit','Naru','Male',3100,'3/31/2014')

Here is the SQL Query that does the job
-- Replace N with number of months
Select *
FROM Employees
Where DATEDIFF(MONTH, HireDate, GETDATE()) Between 1 and N

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