CREATE TABLE table_34145 ("Rank" TEXT, "Common of" TEXT, "Population" FLOAT, "Area  ( km 2  ) " FLOAT, "Density  ( inhabitants/km 2  ) " FLOAT, "Altitude  ( mslm ) " FLOAT)

Which Altitude (mslm) has a Density (inhabitants/km 2) smaller than 1233, and a Rank of 9th?
SELECT SUM("Altitude (mslm)") FROM table_34145 WHERE "Density (inhabitants/km 2 )" < '1233' AND "Rank" = '9th'
SELECT SUM("Altitude (mslm)") FROM "table_34145" WHERE "Density (inhabitants/km 2 )" < '1233' AND "Rank" = '9th'