CREATE TABLE table_64602 ("Name" TEXT, "La Liga" FLOAT, "Copa del Rey" FLOAT, "UEFA Champions League" FLOAT, "FIFA Club World Championship" FLOAT, "Total" FLOAT)

Which Copa del Rey has a La Liga smaller than 0?
SELECT SUM("Copa del Rey") FROM table_64602 WHERE "La Liga" < '0'
SELECT SUM("Copa del Rey") FROM "table_64602" WHERE "La Liga" < '0'