select ch_app.*, A.username ,A.realname , B.username,B.realname,C.username,C.realname
from ch_app left join ch_user A on ch_app.uid = A.uid
left join ch_user B on ch_app.manager = B.uid
left join ch_user C on ch_app.channel_Id = C.uid
select ch_app.*, A.username ,A.realname , B.username,B.realname,C.username,C.realname
from ch_app left join ch_user A on ch_app.uid = A.uid
left join ch_user B on ch_app.manager = B.uid
left join ch_user C on ch_app.channel_Id = C.uid
原文：https://www.cnblogs.com/ordinaryk/p/8404424.html