Question: What is the rank when the col is larger than 0?
SQL: SELECT COUNT("Rank") FROM "2-18946749-5" WHERE "Col (m)" > 0.0;

Question: What is the rank when the elevation is 1628, and Col (m) is larger than 0?
SQL: SELECT COUNT("Rank") FROM "2-18946749-5" WHERE "Elevation (m)" = 1628.0 AND "Col (m)" > 0.0;

Question: What is the elevation of vanuatu, when the rank is smaller than 3?
SQL: SELECT AVG("Elevation (m)") FROM "2-18946749-5" WHERE "Country" = 'vanuatu' AND "Rank" < 3.0;