求教sql语句的意思
select C.ClassID,C.ClassName,C.RootID,L.LayoutFileName,L.LayoutID,C.Child,C.ParentPath From ArticleClass C inner join Layout L on C.LayoutID=L.LayoutID where C.ParentID=" & ClassID & " and C.IsElite=True and C.LinkUrl='' and C.BrowsePurview>=" & UserLevel & " order by C.OrderID"
请问该语句中的C是什么意思啊!数据库中没有C这个表啊