更新超出预期

Question

我试图更新我的表的寄存器，但是sql语句更新所有寄存器。

你能帮我解决一下代码吗？

merge into tableA k
using 
( select  p.host, 
          case count(p.nameJob) when 0 then '0' 
                                 else to_char(count(p.nameJob))  
          end count
                    from (      
                                select distinct b.nameJob, a.host
                                from temp a
                                left join emuser.def_job b
                                on a.grpname in (b.node_id) 
                                and  b.application not like '@NOTINCLUDE'
                        ) p   
           group by p.host ) ran
       on  (k.host=ran.host)
when matched then update set countjobsnodegroup = ran.count;

Select仅显示50个寄存器，但更新所有表寄存器（997）

select  p.host, 
          case count(p.nameJob) when 0 then '0' 
                                 else to_char(count(p.nameJob))  
          end count
                    from (      
                                select distinct b.nameJob, a.host
                                from proc_kk a
                                left join emuser.def_job b
                                on a.grpname in (b.node_id) 
                                and  b.application not like '@NOTINCLUDE'
                        ) p   
           group by p.host;