User-defined parameter

Is it possible to limit the result by a parameter specified by the user?

I have a table with more than a million rows, but I don't need all of them at once, even if I know that a filter is then possible but loading and then searching is time consuming.

If it were possible to define a parameter by the user for SQL, e.g. parOrderId = 1456 or parOrderIDfrom = 1 and parOrderIdTo = 10 it would be possible to limit the size of the result.

Thanks

Select * from tbl.oders whrere (OrderId =1 or <Parameter>=1)

1. When <Parameter> is 0 only OrderId =1 is returned
2. When <Parameter> is q only all records are returned

I think we didn't understand each other..

The user does not have now the option to limit the result set with the parameter. Or?

Sorry about the confusion.
How about this one?

This is fine but the user cannot enter/change it operatively... it's the same as if I defined it in SQL .. unfortunately it does not solve our problem

That only means that we have to modify our software to suit your needs.
We will have a look at it for you.

That might take a while though