How to specify "All" or a single option with a select statement

[Daisy_Ramirez]

I have the select statement below in use to generate csv files. It references a parameters table to grab the start date, end date, division and a few other parameters for the select statement. It works great but I’d like the statement to display data when a “division” is select or “All” records when no division is selected. How do I adjust the expression below for this functionality?

<Start:ORDERBY(Select(Collection[collection_id],AND([vir_route_date]=[start_date_time],[vir_route_date]<=[end_date_time],[vir_route_div]=[division])),[Date Time Entered],FALSE)>>