CREATE TABLE table_15738 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

How many laps did gunnar nilsson drive?
SELECT SUM("Laps") FROM table_15738 WHERE "Driver" = 'gunnar nilsson'
SELECT SUM("Laps") FROM "table_15738" WHERE "Driver" = 'gunnar nilsson'