select Product.*,CorporationUser.UserName,CorporationUser.CorporationName,CorporationUser.Status
from Product left join CorporationUser on CorporationUser.ID=Product.CID
where Product.Parent=15 and Product.Child=21 group by Product.CID order by CorporationUser.UserType desc, CorporationUser.UserSource, Product.ClickNum desc limit 0,36
