CREATE TABLE table_56917 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the total of crowd at Venue of mcg?
SELECT SUM("Crowd") FROM table_56917 WHERE "Venue" = 'mcg'
SELECT SUM("Crowd") FROM "table_56917" WHERE "Venue" = 'mcg'