====== ORACLE TABLE ======

===== CREATE TABLE =====
  - 테이블 생성 예제 <code sql>
CREATE TABLE tb_admin (
  admin_no       number(10)
 ,admin_id       varchar2(20)
 ,last_update_dt date default sysdate
);
</code>
  - 테이블과 컬럼내용 확인 <code sql>
DESC tb_admin
</code>

===== ALTER TABLE =====

^ 컬럼추가 | **ALTER TABLE** tb_admin **ADD** (admin_passwd varchar2(20) ); |
^ 컬럼명변경 | **ALTER TABLE** tb_admin **RENAME COLUMN** admin_id **TO** user_id; |
^ 컬럼속성변경 | **ALTER TABLE** tb_admin **MODIFY** ( admin_no varchar2(20) ); | 
^ 컬럼삭제 | **ALTER TABLE** tb_admin **DROP** (last_update_dt); |