CREATE TABLE machine (machine_id NUMBER, making_year NUMBER, class CLOB, team CLOB, machine_series CLOB, value_points NUMBER, quality_rank NUMBER)
CREATE TABLE repair (repair_id NUMBER, name CLOB, launch_date CLOB, notes CLOB)
CREATE TABLE repair_assignment (technician_id NUMBER, repair_id NUMBER, machine_id NUMBER)
CREATE TABLE technician (technician_id NUMBER, name CLOB, team CLOB, starting_year NUMBER, age NUMBER)

Show the team that have at least two technicians.
SELECT team FROM technician GROUP BY team HAVING COUNT(*) >= 2
SELECT "team" FROM "technician" GROUP BY "team" HAVING COUNT(*) >= 2