Oracle EMP, DEPT, SALGRADE - Table Script

CREATE TABLE EMP(
  EMPNO NUMBER(4) NOT NULL,
  ENAME VARCHAR2(10),
  JOB VARCHAR2(9),
  MGR NUMBER(4),
  HIREDATE DATE,
  SAL NUMBER(7, 2),
  COMM NUMBER(7, 2),
  DEPTNO NUMBER(2)
);

INSERT INTO EMP VALUES   (7369, 'SMITH',  'CLERK',     7902,    TO_DATE('17-12-1980', 'DD-MM-YYYY'),  800, NULL, 20);
INSERT INTO EMP VALUES   (7499, 'ALLEN',  'SALESMAN',  7698,    TO_DATE('20-02-1981', 'DD-MM-YYYY'), 1600,  300, 30);
INSERT INTO EMP VALUES   (7521, 'WARD',   'SALESMAN',  7698,    TO_DATE('22-02-1981', 'DD-MM-YYYY'), 1250,  500, 30);
INSERT INTO EMP VALUES   (7566, 'JONES',  'MANAGER',   7839,    TO_DATE('02-04-1981', 'DD-MM-YYYY'),  1500, NULL, 20);
INSERT INTO EMP VALUES   (7654, 'MARTIN', 'SALESMAN',  7698,    TO_DATE('28-09-1981', 'DD-MM-YYYY'), 1250, 1400, 30);
INSERT INTO EMP VALUES   (7698, 'BLAKE',  'MANAGER',   7839,    TO_DATE('01-05-1981', 'DD-MM-YYYY'),  2850, NULL, 30);
INSERT INTO EMP VALUES   (7782, 'CLARK',  'MANAGER',   7839,    TO_DATE('09-06-1981', 'DD-MM-YYYY'),  3000, NULL, 10);
INSERT INTO EMP VALUES   (7788, 'SCOTT',  'ANALYST',   7566,    TO_DATE('09-12-1982', 'DD-MM-YYYY'), 3000, NULL, 20);
INSERT INTO EMP VALUES   (7839, 'KING',   'PRESIDENT', NULL,    TO_DATE('17-11-1981', 'DD-MM-YYYY'), 5000, NULL, 10);
INSERT INTO EMP VALUES   (7844, 'TURNER', 'SALESMAN',  7698,    TO_DATE('08-09-1981', 'DD-MM-YYYY'),  1500, NULL, 30);
INSERT INTO EMP VALUES   (7876, 'ADAMS',  'CLERK',     7788,    TO_DATE('12-01-1983', 'DD-MM-YYYY'), 1100, NULL, 20);
INSERT INTO EMP VALUES   (7900, 'JAMES',  'CLERK',     7698,    TO_DATE('03-12-1981', 'DD-MM-YYYY'),   950, NULL, 30);
INSERT INTO EMP VALUES   (7902, 'FORD',   'ANALYST',   7566,    TO_DATE('03-12-1981', 'DD-MM-YYYY'),  3000, NULL, 20);
INSERT INTO EMP VALUES   (7934, 'MILLER', 'CLERK',     7782,    TO_DATE('23-01-1982', 'DD-MM-YYYY'), 1300, NULL, 10);

CREATE TABLE DEPT (
  DEPTNO NUMBER(2),
  DNAME VARCHAR2(14),
  LOC VARCHAR2(13) 
);

INSERT INTO DEPT VALUES (10, 'ACCOUNTING', 'NEW YORK');
INSERT INTO DEPT VALUES (20, 'RESEARCH',   'DALLAS');
INSERT INTO DEPT VALUES (30, 'SALES',      'CHICAGO');
INSERT INTO DEPT VALUES (40, 'OPERATIONS', 'BOSTON');

CREATE TABLE SALGRADE(
  GRADE NUMBER,
  LOSAL NUMBER,
  HISAL NUMBER
);

INSERT INTO SALGRADE VALUES (1,  700, 1200);
INSERT INTO SALGRADE VALUES (2, 1201, 1400);
INSERT INTO SALGRADE VALUES (3, 1401, 2000);
INSERT INTO SALGRADE VALUES (4, 2001, 3000);
INSERT INTO SALGRADE VALUES (5, 3001, 9999);