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Part 5 - SQL query to find employees hired in last n months

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This question is asked is many sql server interviews. If you have used DATEDIFF() sql server function then you already know the answer.

We will be using the following Employees table for this demo.
SQL query to find employees hired in last n months

SQL Script to create the table and populate with test data
Create table Employees
     ID int primary key identity,
     FirstName nvarchar(50),
     LastName nvarchar(50),
     Gender nvarchar(50),
     Salary int,
     HireDate DateTime

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

sql server interview questions and answers


  1. how to find employees who are hired yesterday considering time into account.

  2. SELECT*
    FROM EmployeeHD
    ORDER BY HireDate DESC


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