create table session_log
(
   userid      int not null,
   phonenumber int
);

1. 테이블 코멘트

comment on column session_log is '세션 로그';

2. 컬럼 코멘트

comment on column session_log.userid      is 'The user ID';
comment on column session_log.phonenumber is 'The phone number including the area code';

• Mysql처럼 Create Table 괄호 내부에 넣는 것은 불가능