sql 有关问题

sql 问题
数据库是informix，有一个表test，其中有个inputtime字段，是DATETIME YEAR TO SECOND类型的，我想问一下如何实现下面的sql？
sql：
select inputtime,name
from test
where inputtime between '2008/01/01' and '2008/01/02';
这样执行sql报错：Non-numeric character in datetime or interval.
请问如何解决？急！谢谢！！！

------解决方案--------------------
select inputtime,name
from test
where 
TO_CHAR(inputtime,'%Y-%m-%d') between '2008-01-01' and '2008-01-02'

------解决方案--------------------
TO_CHAR(today,'%D') 08/10/09
TO_CHAR(today,'%y-%m-%d') 09-08-10
TO_CHAR(today,'%Y-%m-%d') 2009-08-10
TO_CHAR(today,'%A %B %d %Y') Monday August 10 2009


------解决方案--------------------
where date(inputtime) between '2008/01/01' and '2008/01/02'