Table: uci_cyclo_cross_1998
Columns: nation
gold
silver
bronze
total

Question: The nation of denmark has what average total nad more than 0 gold?
SQL: SELECT AVG("total") FROM uci_cyclo_cross_1998 WHERE "nation" = 'denmark' AND "gold" > 0

Question: Switzerland has how many gold and less than 0 silver?
SQL: SELECT MAX("gold") FROM uci_cyclo_cross_1998 WHERE "nation" = 'switzerland' AND "silver" < 0