CREATE TABLE table_name_85 (altitude__mslm_ NUMBER, density__inhabitants_km_2__ VARCHAR2, rank VARCHAR2)

Which Altitude (mslm) has a Density (inhabitants/km 2) smaller than 1233, and a Rank of 9th?
SELECT SUM(altitude__mslm_) FROM table_name_85 WHERE density__inhabitants_km_2__ < 1233 AND rank = "9th"
SELECT SUM("altitude__mslm_") FROM "table_name_85" WHERE "9th" = "rank" AND "density__inhabitants_km_2__" < 1233