sqldeveloper excludes a selected date

Question

http://sqlfiddle.com/#!4/843de/2

I try the following code on sqlfiddle, works perfect.

but if i execute one of the following select statements on sqldeveloper...

select * from teldat where datum between to_date('04.08.2011','dd.mm.yyyy') and to_date('30.11.2011','dd.mm.yyyy');

select * from teldat where datum <= to_date('30.11.2011','dd.mm.yyyy');

...the 30.11.2011 is not included.

I don't know what's wrong. Can anybody give me a hint?

Kind Regards

Answer 1

select * from teldat where datum <= to_date('30.11.2011 23:59:59','dd.mm.yyyy hh24:mi:ss');

这对我有用。