Question

I would like to list students which added in the table in specific number of days.

@NumberOfDays INT = 15 -- When I list them the added subtraction result must match this result

SELECT S.Name, S.Surname, S.DateAdded
FROM STUDENT S
WHERE (SELECT CAST(GETDATE()-S.DateAdded) = @NumberOfDays)

but this just doesnt work. can anyone help me please?

Answer 1

DATEADD with a negative increment will deduct so;

where S.DateAdded >= dateadd(day, -@NumberOfDays, getdate())

For anything added in the last 15 days.