SQL: Not equal operator Problem

Question

I am using a not equal operator <> in my sql statement but it doesn't retrieve any record which is not equal to the selected date.

CODE:

 Command = New SqlCommand("SELECT * FROM [Products] WHERE [ParkingStartDate] <> @StartDate", myConn)

 Command.Parameters.AddWithValue("@StartDate", StartDate1)

Answer 1

This won't return anything if either of the following is true:

• StartDate1 is a NULL
• ParkingStartDate for all values is a NULL or equal to StartDate1 (obvious one)

Check that you are passing a non-NULL value in StartDate1 and there are records satisfying your condition.