Pesho said...Good blog
Amit Gawas said...Very Good
Kathir said...Wow!!! Great...............
Senthil Alagu said...Really Gr8. I had never known about this before. Thanks.
J Gil said...Clear & simple
Håkan said...Valuable article
Star Nirav said...Awesome explanation... it would be more helpful if you add common errors and explanation during this exercise. I mean, you should give proactive information if we encounter some common errors due to silly mistakes.
Rest... You are one of the best. Hats off to you :)
Star.Nirav@hp.com (India) / +919227258878
jcookie said...I am new to Oracle, and was asked to do a schema export/import. Your article is very clear and well written, I wish you had a book on all of Oracle.
G Hay said...Hi,
The example doesnt seem to work for external tables. (I am using Oracle 10g Express Edition)
If you create an external table with a 'select from' and specify a dmp file which was created using expdp as in the early part of the examples then try to do a select on the external table you get an error.
Also if you try to import a dmp file generated by an external table created with 'select from' but import using impdp you get an error.
It would appear (and this is borne out by the difference in size of the dmp files generated for the same table using the 2 different export techniques) the 2 types of .dmp file are incompatible with one another. Have I missed a command somewhere to force them the same format?
Anyway not too good as I want to use impdp and expdp and be able to query external tables using the impdp generated dump files. Anyone help?
G Hay said..... typo .
If you create an external table withOUT a 'select from' and AS
This is a limitation of the external table functionality. Currently, it will only work for files that were created using the "AS" clause. It won't work for files created by the normal datapump exports using dpexp.
It would be nice if this were included in a future release, but as of 10g it is not possible.
Suresh said...Hi Tim,
Thank you. Very useful blog.
Bikram said...Hi,i think this is the best site which describes about DATA PUMP so clearly.
Sandeep Kumar said...Grrreat !!
Sajith OD said...Simple and Good.......
rajeshkumar said...simple and superb. thanks u very much for ur article. thanks a lot.
Raman, USA said...Great! I would suggest adding a line at the very beginning of the page:
"create the folder manually then create the directory object pointing to that folder"
I made a note in the article about it. It does make things a little clearer for the uninitiated. :)
bals said...one of the gr8 sites for oracle
SRINATH NANDURI said...I really like this article... One of the things that need to be added is the sql to see if the directory object got created...
select * from ALL_DIRECTORIES;
Nawfal said...This is very useful thanks a lot.
dnunknown (Steve) said...Hey Tim,
Great article, I ran into some issues in 126.96.36.199 though w/ the INCLUDE and EXCLUDE portion using command line in RHEL 5, had to use escape characters before the special characters as so;
exclude=TABLE:\"IN \(\'TABLE1\', \'TABLE2\'\)\"
doing some research if using a parameter file for the export the escape characters are not needed (not tested though)
Jeff Moss said...As per dnunknown (Steve)...I get same issue on 10.2.0.4 on AIX, whereby I need to have the escape character (\) before the single and double quotes, when using INCLUDE...LIKE...found the suggestion on OTN forum (https://forums.oracle.com/forums/thread.jspa?threadID=951475).
Useful, as ever.
Sanjay Sonwani said...Hi,i think this is the best site which describes about oracle database adminstration.
Tim... said...Thanks. :)
Mindaugas said...Thanks, helped to start using datapump on 10g
Juan said...I donÂ´t know if is to late but thanks so much again for the way you present the info.
It's never too late to say nice things. :)
Ygor Alberto said...I have a problem, after installing Oracle XE 11g on my virtual machine, I can't use the commands on prompt to import/export tables/databases. What should be the reason?
You need to make sure the ORACLE_HOME/bin path is in your PATH variable. That way the OS will know where to look for them. Either that, or use an explicit path when calling them.
Lin said...External table using dump is a good one. Is it possible to use a dump to create external table taken using exp utility?
Unfortunately not. It must be done using this mechanism.
santosh said...Actually I was looking for implementing expdp on Linux oracle server, now I got an overall idea. Thanks for sharing.
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