Oracle scott用户表分析

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CONNECT SCOTT/tigerCREATE TABLE DEPT       (DEPTNO NUMBER(2) CONSTRAINT PK_DEPT PRIMARY KEY,DNAME VARCHAR2(14) ,LOC VARCHAR2(13) ) ;CREATE TABLE EMP       (EMPNO NUMBER(4) CONSTRAINT PK_EMP PRIMARY KEY,ENAME VARCHAR2(10),JOB VARCHAR2(9),MGR NUMBER(4),HIREDATE DATE,SAL NUMBER(7,2),COMM NUMBER(7,2),DEPTNO NUMBER(2) CONSTRAINT FK_DEPTNO REFERENCES DEPT);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');INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7369, 'SMITH', 'CLERK', 7902, to_date('1980-12-17', 'YYYY-MM-DD'), 800, null, 20);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7499, 'ALLEN', 'SALESMAN', 7698, to_date('1981-02-20', 'YYYY-MM-DD'), 1600, 300, 30);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7521, 'WARD', 'SALESMAN', 7698, to_date('1981-02-22', 'YYYY-MM-DD'), 1250, 500, 30);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7566, 'JONES', 'MANAGER', 7839, to_date('1981-04-02', 'YYYY-MM-DD'), 2975, null, 20);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7654, 'MARTIN', 'SALESMAN', 7698, to_date('1981-09-28', 'YYYY-MM-DD'), 1250, 1400, 30);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7698, 'BLAKE', 'MANAGER', 7839, to_date('1981-05-01', 'YYYY-MM-DD'), 2850, null, 30);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7782, 'CLARK', 'MANAGER', 7839, to_date('1981-06-09', 'YYYY-MM-DD'), 2450, null, 10);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7788, 'SCOTT', 'ANALYST', 7566, to_date('1987-04-19', 'YYYY-MM-DD'), 3000, null, 20);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7839, 'KING', 'PRESIDENT', null, to_date('1981-11-17', 'YYYY-MM-DD'), 5000, null, 10);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7844, 'TURNER', 'SALESMAN', 7698, to_date('1981-09-08', 'YYYY-MM-DD'), 1500, 0, 30);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7876, 'ADAMS', 'CLERK', 7788, to_date('1987-05-23', 'YYYY-MM-DD'), 1100, null, 20);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7900, 'JAMES', 'CLERK', 7698, to_date('1981-12-03', 'YYYY-MM-DD'), 950, null, 30);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7902, 'FORD', 'ANALYST', 7566,to_date('1981-12-02', 'YYYY-MM-DD'), 3000, null, 20);INSERT INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)VALUES (7934, 'MILLER', 'CLERK', 7782, to_date('1982-01-23', 'YYYY-MM-DD'), 1300, null, 10);CREATE TABLE BONUS(ENAME VARCHAR2(10),JOB VARCHAR2(9)  ,SAL NUMBER,COMM NUMBER) ;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);COMMIT;

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