Select with timestamp in the where-clause don't work after importing data

Question

Hello,
I have to databases (I call them db1 and db2, they have the same datastructure) and exported some data from the table "rfm_meas"from db1. Later on I imported that dataset into the "rfm_meas"-table of db2. The table contains a col with the datatype "timestamp(6)" and checking the success of the import looks fine:
(executed on db2)
SELECT
id,acqtime
from
rfm_meas
WHERE
box_id=1
AND id>145029878
Returns two rows:
ID ACQTIME
145029883 01.06.10 10:30:00,000000000
145029884 01.06.10 10:50:00,000000000
It seems there are valid timestamps as I expected.
But if I now want to select all rows from box_id=1 which are newer than e.g. 25-may-2010 I would try this:
SELECT
id,acqtime
from
rfm_meas
WHERE
box_id=1
AND acqtime>=to_timestamp('25-05-2010 17:10:00,000','DD-MM-YYYY HH24:MI:SS,FF3')
And it returns ... nothing!? If I execute the same query on db1 it works correctly.
I guess db1 and db2 has different codepages!?
If I insert some rows from a PL/SQL script in db2 into the "rfm_meas"-table, querys like the one above works fine. Therefore i guess, during importing the data there must be something wrong, so I cann see the timestamp, but can't use it.
How can i fix that? Any ideas?
If someone need more details I will provide it.
Regards
Steffen

Answer 1

check this link out
Importing timestamp columns appears to use to_date instead of to_timestamp