Show me all faults of different parts.
select fault_short_name from part_faults
Give me descriptions of skills required to fix those faults, along with the names of those faults.
select t1.fault_short_name, t3.skill_description from part_faults as t1 join skills_required_to_fix as t2 on t1.part_fault_id = t2.part_fault_id join skills as t3 on t2.skill_id = t3.skill_id