sql script
create table `actor` ( actor_id smallint(5) not null 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' )
create table `actor` ( actor_id smallint(5) not null 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' )