How to compare 2 dates, on date and on time

Hi,
Can anyone explain me how I can compare 2 dates!
I can compare them by date, but not by time.
For example:
Date1 = '2003-07-25 16:50:15.0'
Date2 = '2003-07-25 14:20:48.0'
I want to get the dates that are bigger than the date '2003-07-25 15:30:57.0', but I don't get any result.
Normally I must get Date1 as result.
This is because only the date is compared, not the time.
If I ask the dates bigger than '2003-07-24 14:35:31.0' I get Date1 and Date2 as result!
I want all the data where the foto_crea_date is bigger than the given date.
I do this in my where-clause as followed:
TO_CHAR(FOTO_CREA_DATE,'yyyy-MM-dd hh:mm') > '2003-07-24 06:10:15.0'
and it works just fine for the dates, not for the time
I hope someone can help me!!

Hi,
I tried to use to_date instead of to_char but than I get the following error!
Return Error Message: JBO-27122: SQL error during statement preparation.
Statement: SELECT FotoMain.FOTO_ID, FotoMain.FOTO_CDCM, FotoMain.FOTO_CONF, FotoMain.FOTO_COMP, FotoMain.FOTO_CLIENT, FotoMain.FOTO_CLIENT_GROUP, FotoMain.FOTO_DESCRIPTION, FotoMain.FOTO_PUBL, FotoMain.FOTO_PUBL_SITE, FotoMain.FOTO_ECMA_ID, FotoMain.FOTO_CREA_DATE, FotoMain.FOTO_EXCL, FotoMain.FOTO_MRKT, FotoMain.FOTO_ID || ', ' || FotoMain.FOTO_DESCRIPTION AS VIEW_ATTR FROM FOTO_MAIN FotoMain WHERE (FOTO_CREA_DATE >= TO_DATE('2003-07-24 16:15','yyyy-MM-dd hh:mm')) ORDER BY FOTOMAIN.FOTO_ID
Error Message: ORA-01810: format code appears twice
If tried also something else and it works just fine for the dates but still not with the time.
I tried it as followed:
String last = "2003-07-24 16:15";
String wherelastlogin="TO_CHAR(FOTO_CREA_DATE,'yyyy-MM-dd hh:mm') >= '" + last + "'";
Can anyone help me because I need to compare also the time?!

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