mysql:sql character set utf8mb4 新建utf8mb4表

create table tweets( weiboid varchar(20) not null ,primary key(weiboid), fromweibo varchar(20), dateandtime datatime, username varchar(100), userid varchar(20). weibocontent varchar(350) character set utf8mb4 collate utf8mb4_unicode_ci default null, transfernum int(10), commentnum int(10), likenum int(10), tools varchar(100) character set utf8mb4 collate utf8mb4_unicode_ci default null )default charset = utf8mb4;