What is all the job history info done by employees earning a salary greater than or equal to 12000?
SELECT * FROM  job_history AS T1 JOIN employees AS T2 ON T1.employee_id  =  T2.employee_id WHERE T2.salary  >=  12000
job history info refers to SELECT * FROM job_history; employees earning a salary greater than or equal to 12000 refers to WHERE salary >= 12000; joining job history and employees information refers to JOIN on employee_id;