https://www.nowcoder.com/practice/ac233de508ef4849b0eeb4f38dcf09cf?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1

create table actor
(actor_id smallint(5)  not null primary key comment "主键id",
first_name varchar(45) not null comment "名字",
last_name varchar(45) not null comment "姓氏",
last_update date not null comment"日期")