query: SELECT employee_id FROM job_history GROUP BY employee_id HAVING COUNT(*)  >= 2
question: display the ID for those there employees as did two or more jobs in the pasts.
query_toks: SELECT employee_id FROM job_history GROUP BY employee_id HAVING COUNT ( * ) > = 2
query_toks_no_value: select employee_id from job_history group by employee_id having count ( * ) > = value
question_toks: display the ID for those there employees as did two or more jobs in the pasts.