CREATE TABLE table_46742 ("Country" TEXT, "Amateur Era" FLOAT, "Open Era" FLOAT, "All-time" FLOAT, "First title" FLOAT, "Last title" FLOAT)

What is the sum of All-Time, when Amateur Era is less than 0?
SELECT SUM("All-time") FROM table_46742 WHERE "Amateur Era" < '0'
SELECT SUM("All-time") FROM "table_46742" WHERE "Amateur Era" < '0'