代理商返佣问题，求递归查询 ####################百分比结贴
代理商表UserAuction
Uid             ,parentId                      ,name                              ,PecenBail
78                   ,0                             ,华东代理                           ,0.6
79                    ,78                           ,上海代理                         ,0.5
80                     ,79                            ,上海浦东代理                ,0.2

用户表UserTb
 Id                              ,   name                    ,    Uid
11111111             ,   张三                       ,79
22222222         ,  李四                        ,79
33333333         ,王五                           ,80
44444444            ,刘六                        ,78


合同表MatchedTb
Id              ,CreateTime             ,BUserId(为买家ID)            ,SUserId(为卖家ID)          Bail(为合同金额)
1           ,2014/3/19 14:48:35     ,22222222                      ,  11111111                        50
2