%emp(Empno, Ename, Job, Mgr, Hiredate, Sal, Comm, Deptno)
emp(7839, king, president, null, 19811117, 5000, null, 10).
emp(7698, blake, manager, 7839, 19810501, 2850, null, 30).
emp(7782, clark, manager, 7839, 19810609, 1500, null, 10).
emp(7566, jones, manager, 7839, 19810402, 2975, null, 20).
emp(7654, martin, salesman, 7698, 19810928, 1250, 1400, 30).
emp(7499, allen, salesman, 7698, 19810220, 1600, 300, 30).
emp(7844, turner, salesman, 7698, 19810908, 1500, 0, 30).
emp(7900, james, clerk, 7698, 19811203,  950, null, 30).
emp(7521, ward, salesman, 7698, 19810222, 1250,  500, 30).
emp(7902, ford, analyst, 7566, 19811203, 3000, null, 20).
emp(7369, smith, clerk, 7902, 19801217,  800, null, 20).
emp(7788, scott, analyst, 7566, 19821209, 3000, null, 20).
emp(7876, adams, clerk, 7788, 19830112, 1100, null, 20).
emp(7934, miller, clerk, 7782, 19820123, 1300, null, 10).

%dept(Deptno, Dname, Loc)
dept(10, accounting, newyork).
dept(20, research, dallas).
dept(30, sales, chicago).
dept(40, operations, boston).

%salgrade(Grade, Losal, Hisal)
salgrade(1, 700, 1200).
salgrade(2, 1201, 1400).
salgrade(3, 1401, 2000).
salgrade(4, 2001, 3000).
salgrade(5, 3001, 9999).