Table schema:
CREATE TABLE table_name_65 (dc VARCHAR, wins VARCHAR, drivers VARCHAR, races VARCHAR, points VARCHAR)

Question: What kind of D.C. has Races smaller than 20, and Points larger than 0, and Drivers of christian vietoris, and Wins of 1?
SQL: SELECT dc FROM table_name_65 WHERE races < 20 AND points > 0 AND drivers = "christian vietoris" AND wins = 1