CREATE TABLE table_name_6 (yr_plyf INT, g_plyf VARCHAR, coach VARCHAR)

What is the sum of the yr plyf of coach ed robinson, who has a G plyf of 0?
SELECT SUM(yr_plyf) FROM table_name_6 WHERE g_plyf = 0 AND coach = "ed robinson"
SELECT SUM("yr_plyf") FROM "table_name_6" WHERE "coach" = "ed robinson" AND "g_plyf" = 0