Simple asp.net question

[No Limit]

I'm working with asp.net and an Access database.

    Dim sSelect As String = "Select Email, Address, City, State, ZipCode, PhoneNumber " _
                                  & "From Customers Where Email = @Email"

What the heck does the "@" sign mean? The teacher in my class didn't explain it very well and the textbook doesn't either. I'm guessing it's something like pass-by-reference, but I doubt it..

 

[ascorbic]

Its a parameter for the query.

 

[No Limit]

Oh OK. I like how the teacher assumes that everyone knows what a parameter is...