CREATE TABLE table_name_68 (laps INT, grid VARCHAR, time_retired VARCHAR)

What is the high lap total for a grid less than 6, and a Time/Retired of halfshaft?
SELECT MAX(laps) FROM table_name_68 WHERE grid < 6 AND time_retired = "halfshaft"
SELECT MAX("laps") FROM "table_name_68" WHERE "grid" < 6 AND "halfshaft" = "time_retired"