一个关于union的问题
select * from corp
where cp_name like '%% '
and
cp_code in
(select ga_corp from gstacc a, account b
where a.ga_accno = b.ac_accno and b.ac_ctime > '2007-02-28 23:59:20 ' and b.ac_ctime <= '2007-03-31 23:30:25 '
union
select ga_corp from htlhis..gstacc ha, htlhis..account hb
where ha.ga_accno = hb.ac_accno and hb.ac_ctime > '2007-02-28 23:59:20 '
and hb.ac_ctime <= '2007-03-31 23:30:25 ' )
我使用Union时，提示不能使用
问解决方式
[解决办法]
select
*
from
corp
where
cp_name like '%% '
and
(cp_code in (select ga_corp from gstacc a, account b
where a.ga_accno = b.ac_accno and b.ac_ctime > '2007-02-28 23:59:20 ' and b.ac_ctime <= '2007-03-31 23:30:25 ')
or
(cp_code in (select ga_corp from htlhis..gstacc ha, htlhis..account hb
where ha.ga_accno = hb.ac_accno and hb.ac_ctime > '2007-02-28 23:59:20 '
and hb.ac_ctime <= '2007-03-31 23:30:25 '))
[解决办法]
你的结果集结构不同。select * from corp select ga_corp from 你让两个结果集结构相同。还有哥们，sybase没有oracle那么智能。所有你的sql的质量只能靠你自己控制。你的sql有问题啊,尽量不要用like “％％” .建议看看sargs的规则。
[解决办法]
用union all时，要确保两个表的列数，对应列的数据类型相同，系统自动以第一个查询的列名作为结果的列名。
[解决办法]
个人建议用存储过程来实现，将你SQL语句进行拆分，并将结果放入临时表，最后返回临时表。
