Update code in procedure

Question

Hi  I've the folloiwng requirement where i need to update the table .
Can you please  hint me the better way to the folloiwng update statement instead of using  FOR LOOP;
create or replace procedure upd_emp( s_id number ) as
v_flag char(1);
v_set_id org_hist.set_id%type;
v_val emp_hist.val%type;
rd varchar2(100);
begin
  for i in  (select id ,nm,sal,rowid rd from emp where seq_id = s_id   ) loop
     select flg   INTO v_flag
              from emp_hist  e
            where  exists (
                 select 1 
                  from dept_hist d , org_hist s
                where e.d_id = d.d_id
                   and f.nam = e.nm
                   and s.e_ID = d.e_ID
                   and e.d_date =s.d_Date
                   and s.SET_ID = i.id )
                   and e.VAL = i.sal ;
update emp  set  Date_TIME = null , seq_sd_flag = v_flag
                 where rowid = rd ;
end loop;              
  commit;
exception when others then
   log_proc( -----) ;
end upd_emp; 

Answer 1

I think we can achieve the whole thing as single SQL :
Update (Select emp.id,emp.nm, emp.sal,emp.rowid rd, Date_Time, seq_sd_flag, flg
from emp, emp_hist e where seq_id = s_id
and exists (select 1  from dept_hist d , org_hist s
where e.d_id = d.d_id and f.nam = e.nm and s.e_ID = d.e_ID and e.d_date =s.d_Date and s.SET_ID = i.id )
and e.VAL = emp.sal)
set  Date_TIME = null , seq_sd_flag = flg;