drop table emp;
drop table dept;
drop table salgrade;

CREATE TABLE DEPT (
 DEPTNO              NUMBER(2) CONSTRAINT DEPT_PRIMARY_KEY PRIMARY KEY,
 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 EMP (
 EMPNO               NUMBER(4) CONSTRAINT EMP_PRIMARY_KEY PRIMARY KEY , 
 ENAME               VARCHAR2(10),
 JOB                 VARCHAR2(9),
 MGR                 NUMBER(4) CONSTRAINT EMP_SELF_KEY REFERENCES EMP (EMPNO),
 HIREDATE            DATE,
 SAL                 NUMBER(7,2),
 COMM                NUMBER(7,2),
 DEPTNO              NUMBER(2) NOT NULL CONSTRAINT EMP_FOREIGN_KEY REFERENCES DEPT (DEPTNO));

 /* disable constraint until we have the data in */
alter table emp disable constraint EMP_SELF_KEY;

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'),2975,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'),2450,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'),1500,0,30);
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);

alter table emp enable constraint EMP_SELF_KEY;
  
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);

DROP TABLE DUMMY;
 
CREATE TABLE DUMMY (
 DUMMY               NUMBER );
 
INSERT INTO DUMMY VALUES (0);
COMMIT;