How to Reference Parameter in ODBC Query

Hi All

I've got the following query and it works fine.  The lines below are from the advanced editor:

let
Source = Odbc.Query("dsn=DW", "SELECT * FROM mwrdw.dbo.as_sales WHERE fiscyear >= 2020 ")
in
Source

I'm trying to replace the fiscyear with a parameter value but I'm failing.  I've set up a new parameter ("Parameter1") with a current value of 2020.  I've then changed the text in the advanced editor to:

let
Source = Odbc.Query("dsn=DW", "SELECT * FROM mwrdw.dbo.as_sales WHERE fiscyear >= "Parameter1" ")
in
Source

I get a "Token Comma expected" error.  I've tried a couple of variations with no success.  The fiscyear field in the source contains four digit years stored as numbers.

I'm trying to set up a parameter that I can pass to the service allowing me to edit the fisc year there.  The table stores a huge amount of data (too much for the desktop application that gives a memory error when too many years are loaded) but Power BI service will handle this. 

If I can get the parameter to work I can then have a much smaller desktop filesize while I work but pass many more years to the file in the service..  I hope I've explained that right!