SQL 中 where 条件中 in 后面 加 CASE WHEN 语句 报错
select new_projectsize, count(cifno)
from (select distinct (a.cifno) as cifno,
b.new_projectsize as new_projectsize
from cr_xdall a, cr_corp_inf b
where substr(a.mon_date, 1, 6) = '201212'
and xdflag = '1'
and opn_br_no in
(case when '1' = '1' then
(select brno from poozfmessagebrno where upbrno = '56601') else
'50000' end)
and a.cifno = b.cifno
and bal != '0'
group by b.new_projectsize, a.cifno)
group by new_projectsize; sql
[解决办法]
表结构呢

是可以用，
建议你用排除法，
[解决办法]
楼主SQL有待提高，表结构贴出来才能给你看看
[解决办法]
select brno from poozfmessagebrno where upbrno = '56601'

这句查查出来的是否能有唯一的一条值。。。

另，报的什么错。。。错误代码多少？？