Create table users(username varchar(50) primary key,password varchar(255));
create table board(id int primary key auto_increment, title varchar(50), content varchar(5000),clickcnt int,image varchar(100),username varchar(30),date timestamp default now());
create table board(id serial primary key, title varchar(50), content varchar(5000),clickcnt int,image varchar(100),username varchar(30),date timestamp default now());
alter table board alter column content set not null;
alter table board alter column title set not null;
Create table users(username varchar(50) primary key,password varchar(255));
ALTER TABLE board ADD COLUMN created_at timestamp default now();
create table board(id serial primary key, title varchar(50), content varchar(5000),clickcnt int,image varchar(100),username varchar(30),date timestamp default now());
alter table board alter column content set not null;