Among those engineers who have visited, which engineer makes the least number of visits? List the engineer id, first name and last name.
create table engineer_visits (engineer_id varchar, PRIMARY KEY (engineer_id)); create table maintenance_engineers (engineer_id varchar, first_name varchar, last_name varchar, PRIMARY KEY (engineer_id))
select t1.engineer_id, t1.first_name, t1.last_name from maintenance_engineers as t1 join engineer_visits as t2 on t1.engineer_id = t2.engineer_id group by t1.engineer_id order by count(*) limit 1