Tell me all the names of the counties.
select county_name from county
Okay. I want to know their delegates.
select t2.delegate from county as t1 join election as t2 on t1.county_id = t2.district
Furthermore, please tell me which ones' population is smaller than 100000?
select t2.delegate from county as t1 join election as t2 on t1.county_id = t2.district where t1.population < 100000