sql语句 如何在oracle中实现。。
update a set a.hth= '33 ',a.htzh= '00 ',a.rkrq = '20070607 ',a.lrrq= '20070620 '
from a
join b
on a.id=b.id

[解决办法]
这样呢

update a set a.hth= '33 ',a.htzh= '00 ',a.rkrq = '20070607 ',a.lrrq= '20070620 '
where (select count(*) from a,b where a.id=b.id)> 0
[解决办法]
update a set a.hth= '33 ',a.htzh= '00 ',a.rkrq = '20070607 ',a.lrrq= '20070620 '
where a.id in (select id from b)