select a.name from A a,B b where a.name=b.name 
and to_char(a.date,'yyyymmdd') <= to_char(b.end_date,'yyyymmdd') 
and to_char(a.date,'yyyy-mm-dd')='2010-11-15'

select a.name from A a,B b where a.name=b.name 
and to_char(a.date,'yyyy-mm-dd')='2010-11-15'

------解决方案--------------------
你的语句相当于
select a.name from A a,B b where a.name=b.name  
and  to_char(b.end_date,'yyyy-mm-dd') = > '2010-11-15'
你看看这个有数据不，





------解决方案--------------------
探讨

SQL code

select a.name from A a,B b where a.name=b.name 
and to_char(a.date,'yyyymmdd') <= to_char(b.end_date,'yyyymmdd') 
and to_char(a.date,'yyyy-mm-dd')='2010-11-15'

 
Orale 查询语句就像我上面写的一样 ……


------解决方案--------------------
注意提问智慧
把表的测试数据贴出来吧
1、表结构
2、测试数据
3、需求描述
4、期待得到的结果数据
5、其他疑问




------解决方案--------------------
SQL code

--坑爹阿，咋不行了？
with tab1 as (
select 'a' name, sysdate A_date from dual union all
select 'b', sysdate + 1 from dual union all
select 'c', sysdate + 2 from dual
),
tab2 as (
select 'a' name, sysdate B_date from dual union all
select 'b' , sysdate + 1 from dual union all
select 'c', sysdate from dual
)
--只用name关联，查询结果
select * from tab1, tab2 where tab1.name = tab2.name
------------------
a   *********
b   *********
c   省略行不行，还用写这些吗？

--用name和日期两个条件查询结果
select * from tab1, tab2 where tab1.name = tab2.name and 
to_char(tab1.A_date, 'yyyymmdd') = to_char(tab2.B_date, 'yyyymmdd')
---------------------
a  ******
b  这个也省略行不行？？阿？行不行

--用三个条件查询
select * from tab1, tab2 where tab1.name = tab2.name and 
to_char(tab1.A_date, 'yyyymmdd') = to_char(tab2.B_date, 'yyyymmdd')
and to_char(tab1.A_date, 'yyyy-mm-dd') = '2011-09-20'
--------------------
b  *******(还是省略有木有)

--ps：我擦，累死鸟！！全部都是一个一个字母敲上去的，真JB累阿！！！！
--楼主哥们，你再好好看看你的表吧！

------解决方案--------------------
探讨


SQL code

--坑爹阿，咋不行了？
with tab1 as (
select 'a' name, sysdate A_date from dual union all
select 'b', sysdate + 1 from dual union all
select 'c', sysdate + 2 from dual
),
tab2 as (
select 'a' name, s……


------解决方案--------------------
and 前后的条件应该对调！

------解决方案--------------------
SQL code

select a.name from A as a
inner join B as b on b.name = a.name and b.end_date >= a.date
where to_char(a.date,'yyyy-mm-dd')= '2010-11-15'