In a SQL, I am extracting some records from a table. I want to union that in order to add one record manually at the end. I have a syntax like this:

SELECT Description AS Descript,Numero FROM GROUP WHERE IRegion>0_
 UNION SELECT 'Public' AS Descript,0 AS Numero FROM GROUP ORDER BY 2

I know this is not the correct syntax. As if I have no record in GROUP, I end up with no result. What is the proper syntax?