데이터베이스 - 0521
테이블 생성CREATE TABLE EMP( EMPNO NUMBER(4) PRIMARY KEY, ENAME VARCHAR2(12), JOB VARCHAR2(12), MGR NUMBER(4), HIREDATE DATE, SAL NUMBER(7,2), COMM NUMBER(7,2), DEPTNO NUMBER(2)); CREATE TABLE DEPT( DEPTNO NUMBER(2) PRIMARY KEY, DNAME VARCHAR2(21), LOC VARCHAR2(21)); CREATE TABLE SALGRADE( GRADE NUMBER(12), LOSAL NUMBER, HISAL NUMBER); 데이터 삽입insert into emp ..
