Change ORACLE DB Gregorian / Persian calender...

Hi,
I'm using ORACLE 11g XE (express edition)
I need to replace the Gregorian calender with the Persian calender settings...
And how to convert the existing data?
Thank you in advance,
Best
Andreja
andrejaTJAsked:
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johnsoneSenior Oracle DBACommented:
I don't have a version of XE that I could test this on, but from what I have found, this is controlled by the NLS_CALENDAR parameter.  No conversion of data should be necessary.  In order to see of XE supports the parameter, I would try this command in SQL*Plus:

ALTER SESSION SET NLS_CALENDAR='Persian';

If that works you should be able to change it in the init.ora.  It has been a while since I used any version of XE, so you could try this:

ALTER SYSTEM SET NLS_CALENDAR='Persian' scope=both;

You could also set this on the client side.  If you are using Windows as a client, you should be able to change it in the registry on the client and set the value that way.

For reference, the documentation on that parameter is here -> http://docs.oracle.com/cd/E11882_01/server.112/e40402/initparams144.htm#REFRN10116
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