In standard SQL I sometimes "DECLARE @Variable VARCHAR = 'some constant value'" so I can use "@Variable" in various places throughout the remainder of the query, instead of writing out "some constant value" every time - it makes the code a bit easier to read, and it makes it easier to adjust that constant value in the future if I ever need to.
Is this possible with a SWQL query? (I can't find any documentation on SWQL query parameter syntax.)