Table: wrg_champs_medals
Columns: rank
nation
gold
silver
bronze
total

Question: Which Rank has a Total larger than 17, and a Silver smaller than 13?
SQL: SELECT "rank" FROM wrg_champs_medals WHERE "total" > 17 AND "silver" < 13

Question: Which Total is the highest one that has a Gold of 1, and a Nation of czechoslovakia?
SQL: SELECT MAX("total") FROM wrg_champs_medals WHERE "gold" = 1 AND "nation" = 'czechoslovakia'

Question: How much Total has a Silver smaller than 0?
SQL: SELECT COUNT("total") FROM wrg_champs_medals WHERE "silver" < 0

Question: Which Total has a Rank of 4, and a Silver smaller than 4?
SQL: SELECT AVG("total") FROM wrg_champs_medals WHERE "rank" = '4' AND "silver" < 4

Question: Which Silver is the lowest one that has a Bronze smaller than 1, and a Gold larger than 0?
SQL: SELECT MIN("silver") FROM wrg_champs_medals WHERE "bronze" < 1 AND "gold" > 0