Which Altitude (mslm) has a Density (inhabitants/km 2) smaller than 1233, and a Rank of 9th?
CREATE TABLE "see_also" (
  "rank" text,
  "common_of" text,
  "population" real,
  "area_km_2" real,
  "density_inhabitants_km_2" real,
  "altitude_mslm" real
);
SELECT SUM("altitude_mslm") FROM "see_also" WHERE "density_inhabitants_km_2"<1233 AND "rank"='9th';