CREATE TABLE Parts (part_name VARCHAR(255), part_id VARCHAR(255)); CREATE TABLE Part_Faults (part_id VARCHAR(255))
Which kind of part has the least number of faults? List the part name.
    
SQL: SELECT T1.part_name FROM Parts AS T1 JOIN Part_Faults AS T2 ON T1.part_id = T2.part_id GROUP BY T1.part_name ORDER BY COUNT(*) LIMIT 1