如：
declare
cursor mycur is
select (y.incept_class||'-'||to_char(y.incept_no)) ,y.iid
from ut_gw_urge t, ut_gw_archive_incept y
where t.iid = y.iid
for update;
/*type myrecord is record*/
newnum VARCHAR2(36);/*new value*/
yiid NUMBER;/*condition*/
begin
open mycur;
loop
fetch mycur into newnum,yiid;
exit when mycur%notfound;
update ut_gw_urge set ut_gw_urge.num =newnum
where ut_gw_urge.iid = yiid;
/*fetch mycur into yiid;*/
end loop;
close mycur;
end;
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