CREATE TABLE table_63628 ("Rank" FLOAT, "Canton" TEXT, "Highest point" TEXT, "Highest elevation" TEXT, "Lowest point" TEXT, "Lowest elevation" TEXT)

Wich rank is given to the Canton of Schaffhausen?
SELECT SUM("Rank") FROM table_63628 WHERE "Canton" = 'schaffhausen'
SELECT SUM("Rank") FROM "table_63628" WHERE "Canton" = 'schaffhausen'