insert into message values(null,#{memberid},#{content},#{savetime},'','') select * from message where 1=1 order by id desc select * from message where 1=1 and memberid in (select id from member where uname like "%"#{0}"%") update message set replycontent=#{replycontent},replysavetime=now() where id=#{id} delete from message where id=#{id}