sql table board
create table board(
num number primary key,
writer varchar2(100),
subject varchar2(300),
email varchar2(100),
content varchar2(4000),
passwd varchar2(100),
reg_date date,
readcount number default 0,
ip varchar2(100),
ref number,
re_step number,
re_level number
);
desc board;
create sequence board_seq;
select count(*) from board 글 갯수 확인
