oracle SQL> create table job_grades ( 2) grade_level varchar2(10), 3) lowest_sal number(20), 4) highest_sal number(20));

Insert into job_grades values (A, 100, 2999); Insert into job_grades values (B, 3000, 5999); Insert into job_grades values (C, 6000, 9999); Insert into job_grades values (D, 10000, 14999); Insert into job_grades values (E, 15000, 24999); Insert into job_grades values (F, 25000, 40000);