用游標(biāo)實(shí)現(xiàn)，我覺得絕對這種方法比較安全的。
--首先定一個(gè)游標(biāo)把需要用到的一些數(shù)據(jù)存放到游標(biāo)中:
復(fù)制代碼 代碼如下:
declare
CURSOR D_CURSOR_CUS_INFO IS
select t3.id_ as id_,
t3.owe_money_ as owe_money_,
a.heatingArea as heating_area_
from T_CUS_OWE_MONEY_2 t2
left join T_CUS_OWE_MONEY_3 t3 on t2.id_= t3.id_
left join (select s.bh, sum(
case
when s.stkbz='0' then nvl(s.mj,0)
when s.stkbz='1' then 0-nvl(s.mj,0)
end
) as heatingArea from sk s where s.nd = '2008-2009' group by s.bh) a on t2.bh_=a.bh
where t3.owe_money_- t2.owe_money_ = a.heatingArea*5 and t3.OWE_MONEY_ > 0;
--然后循環(huán)游標(biāo)對數(shù)據(jù)進(jìn)行更新：
復(fù)制代碼 代碼如下:
begin
FOR everyRow IN D_CURSOR_CUS_INFO
loop
update T_CUS_YEAR_STATUS t
set t.HEATING_AREA_ = everyRow.HEATING_AREA_,
t.OWE_MONEY_ = everyRow.owe_money_
where t.YEAR_ = '2008-2009'
and t.id_ = everyRow.id_;
end loop;
commit;
end;
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