Hi rani
Refer below sample query.
Database
For this example I have used of Northwind database that you can download using the link given below.
Download Northwind Database
SQL
SELECT *
FROM Employees
WHERE [BirthDate] >= DATEADD(HOUR, -2, GETDATE()) AND [BirthDate] <= GETDATE()
ORDER BY [BirthDate] ASC
-- OR
SELECT *
FROM Employees
WHERE [BirthDate] BETWEEN DATEADD(HOUR, -2, GETDATE()) AND GETDATE()
ORDER BY [BirthDate] ASC