CREATE TABLE table_66246 ("Rank" FLOAT, "Heat" FLOAT, "Name" CLOB, "Nationality" CLOB, "Result" CLOB)

What is Melaine Walker's Rank?
SELECT SUM("Rank") FROM table_66246 WHERE "Name" = 'melaine walker'
SELECT SUM("Rank") FROM "table_66246" WHERE "Name" = 'melaine walker'