Question: What is the sum of Silver when the total is less than 6, the rank is 6 and the Bulgaria is the nation?
SQL: SELECT SUM("Silver") FROM "2-15381310-1" WHERE "Total" < 6.0 AND "Rank" = '6' AND "Nation" = 'Bulgaria';

Question: What nation has a bronze of 2 with a total less than 5 and rank of 6?
SQL: SELECT "Nation" FROM "2-15381310-1" WHERE "Bronze" = 2.0 AND "Total" < 5.0 AND "Rank" = '6';

Question: What is the lowest Total for rank 3 with more than 4 gold?
SQL: SELECT MIN("Total") FROM "2-15381310-1" WHERE "Rank" = '3' AND "Gold" > 4.0;

Question: What is the lowest Total for italy with less than 0 silver?
SQL: SELECT MIN("Total") FROM "2-15381310-1" WHERE "Nation" = 'italy' AND "Silver" < 0.0;

Question: What is the Nation with less than 1 silver, and the total is 1, and bronze is less than 0?
SQL: SELECT "Nation" FROM "2-15381310-1" WHERE "Silver" < 1.0 AND "Total" = 1.0 AND "Bronze" = 0.0;