Oralce培训笔记-上课所用表结构

上课所用表结构：
desc emp:
Name Type Nullable Default Comments
-------- ------------ -------- ------- --------
EMPNO NUMBER(4)
ENAME VARCHAR2(10) Y
JOB VARCHAR2(9) Y
MGR NUMBER(4) Y
HIREDATE DATE Y
SAL NUMBER(7,2) Y
COMM NUMBER(7,2) Y
DEPTNO NUMBER(2) Y

desc dept:
Name Type Nullable Default Comments
------ ------------ -------- ------- --------
DEPTNO NUMBER(2)
DNAME VARCHAR2(14) Y
LOC VARCHAR2(13) Y

desc salgrade:
Name Type Nullable Default Comments
----- ------ -------- ------- --------
GRADE NUMBER Y
LOSAL NUMBER Y
HISAL NUMBER Y

desc bonus:
Name Type Nullable Default Comments
----- ------------ -------- ------- --------
ENAME VARCHAR2(10) Y
JOB VARCHAR2(9) Y
SAL NUMBER Y
COMM NUMBER Y