SELECT A.*,B.CourseName,B.CourseFeature,D.TeacherName,IFNULL(D.TeacherHead,'') AS TeacherHead,E.SName AS SchoolName,R.RoomName
,IFNULL(t.GuestNum,0) AS OrderStudentCount,IFNULL(B.SellPrice,0) AS CourseSellPrice,IFNULL(B.CoursewareFee,0) AS CoursewareFee,IFNULL(B.TextbookFee,0) AS TextbookFee,B.SellPriceType as CourseSellPriceType,IFNULL(B.OriginalPrice,0) AS CourseOriginalPrice ,B.B2CRatio,B.B2CReNewRatio,B.B2BRebateRatio,B.B2BReNewRatio,B.SchoolRebateRatio,B.SchoolReNewRatio
,B.CourseSubject,IFNULL(csubject.SubjectName,'') AS CourseSubjectName
,B.CourseSubject,IFNULL(csubject.SubjectName,'') AS CourseSubjectName,IFNULL(b.ClassHours,0) as TotalClassHours
FROM rb_class AS A LEFT JOIN rb_course AS B ON A.CouseId=B.CourseId
LEFT JOIN rb_teacher AS D ON A.Teacher_Id=D.TId
LEFT JOIN rb_class_room AS R ON A.ClassRoomId=R.RoomId
SELECT A.*,IFNULL(B.StuName,'') AS VisitorName,C.ClassDate,C.ClassTime,C.EndTime,C.ClassContent,IFNULL(D.TeacherName,'') AS TeacherName,IFNULL(E.RoomName,'') AS RoomName
,IFNULL(B.StuTel,'') AS StuTel,IFNULL(F.LessonName,'') AS LessonName,IFNULL(B.QQ,'') AS QQ,IFNULL(B.WeChatNo,'') AS WeChatNo,C.ReserveType,C.ClassPlanId
,IFNULL(G.OrderCount,0) AS OrderCount
,IFNULL(G.OrderCount,0) AS OrderCount,c.ClassRoomId,C.TeacherId,c.TrialLessonId
FROM RB_Visitor_Reserve AS A LEFT JOIN rb_student AS B ON A.Visitor_Id=B.StuId