CREATE TABLE table_54728 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

What is the sum of laps for Derek Warwick?
SELECT SUM("Laps") FROM table_54728 WHERE "Driver" = 'derek warwick'
SELECT SUM("Laps") FROM "table_54728" WHERE "Driver" = 'derek warwick'