Db::view('User','id,name') ->view('Profile','truename,phone,email','Profile.user_id=User.id') ->view('Score','score','Score.user_id=Profile.id') ->where('score','>',80) ->select();
生成的SQL语句类似于：
SELECT USER .id, USER . NAME, PROFILE .truename, PROFILE .phone, PROFILE .email, Score.score FROM think_user USER INNER JOIN think_profile PROFILE ON PROFILE .user_id = USER .id INNER JOIN think_socre Score ON Score.user_id = PROFILE .id WHERE Score.score > 80

请问From后面跟的两个名称和跟在JOIN后面的两个名称，是什么东西？SQL语句没见过这样的