How to set or change character set for Oracle 10 XE

Installing via RPM on Linux.
I need to have my database set to use UTF8 and WE8ISO8859P15 as the character set and national character set. (Think those are in the right order. If not, it's the opposite.)
If I do a standard "yum localinstall rpm-file-name," it installs Oracle. I then run the "/etc/init.d/oracle-xe configure" command to set my ports.
Every time I do this, I end up with AL32/AL16 character sets.
I finally hardcoded ISO-8859-15 as the Linux 'locale' character set and set this in the various bash profile config files. Now, I end up with WE8MSWIN1252 as the character set and AL16UTF16 as the national character set.
I've tried editing the createdb.sh script to hard code the character set types and then copied that file over the original while the RPM is still installing. I've tried editing the nls_lang.sh script to hard code the settings there and copied over the original shell script while the RPM is still installing.
Doesn't matter.
HOW can I do this? If I wait until after the RPM is installed and try running the createdb.sh file, then it ends up creating a database but not doing everything properly. I end up missing pfiles or spfiles. Various errors crop up.
If I try to change them from the sql command line, I am told that the new character set must be a superset of the old one. It fails.
I'm new to Oracle, so I'm treading water that's uncharted. In short, I need community help. It's important to the app I'm running and attempting to migrate from to maintain these character sets.
Thanks.

I don't think you can change Oracle XE character set. When downloading Oracle XE you must choose to download:
- either the Universal Edition using AL32UTF8
- or the Western Euopean Edition using WE8MSWIN1252.
See http://download.oracle.com/docs/cd/B25329_01/doc/install.102/b25144/toc.htm#BABJACJJ
If you really need UTF8 instead of AL32UTF8 you need to use Oracle Standard Edition or Oracle Entreprise Edition:
these editions allow to select database character set at database creation time which is not really possible with Oracle XE
Note that changing environment variable NLS_LANG has nothing to do with changing database character set:
http://download.oracle.com/docs/cd/B25329_01/doc/install.102/b25144/toc.htm#BABBGFIC

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    Article from Metalink
    Doc ID:      Note:66320.1
    Subject:      Changing the Database Character Set or the Database National Character Set
    Type:      BULLETIN
    Status:      PUBLISHED
         Content Type:      TEXT/PLAIN
    Creation Date:      23-OCT-1998
    Last Revision Date:      12-DEC-2003
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Note that changing the database or the national character set as described in this document does not change the actual character codes, it only changes the character set declaration. If you want to convert the contents of the database (character codes) from one character set to another you must use the Oracle Export and Import utilities. This is needed, for example, if the source character set is not a binary subset of the target character set, i.e. if a character exists in the source and in the target character set but not with the same binary code. All binary subset-superset relationships between characters sets recognized by the Oracle Server are listed in [NOTE:119164.1] "Changing Database Character Set - Valid Superset Definitions". Note: The varying width character sets (like UTF8) are not supported as national character sets in Oracle8(i) (see [NOTE:62107.1]). 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This utility is included in the Oracle Server 8.1.7 software distribution and the newest Character Set Scanner version can be downloaded from the Oracle Technology Network site, http://otn.oracle.com The Character Set Scanner on OTN is available for limited number of platforms only but it can be used with databases on other platforms in the client/server configuration -- as long as the database version matches the Character Set Scanner version and platforms are either both ASCII-based or both EBCDIC-based. It is recommended to use the newest Character Set Scanner version available from the OTN site. 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Thus you must delete all CLOB column values before changing the database character set to a varying width character set. In Oracle 8.1.5 and later CLOB values are valid in varying width character sets but they are converted to Unicode UCS-2 before being stored. But UCS-2 encoding is not a binary superset of any other Oracle character set. Even codes of the basic ASCII characters are different, e.g. single-byte code for "A"=0x41 becomes two-byte code 0x0041. This implies that even if the new varying width character set is a binary superset of the old fixed width character set and thus VARCHAR2/LONG character codes remain valid, the fixed width character codes in CLOB values will not longer be valid in UCS-2. As mentioned above, the ALTER DATABASE [NATIONAL] CHARACTER SET statement does not change character codes. Thus, before changing a fixed width database character set to a varying width character set (like UTF8) in Oracle 8.1.5 or later, you first have to export all tables containing non-NULL CLOB columns, then truncate these tables, then change the database character set and, finally, import the tables back to the database. The import step will perform the required conversion. If you omit the steps above, the character set change will succeed in Oracle8(i) (Oracle9i disallows the change in such situation) and the CLOBs may appear to be correctly legible but as their encoding is incorrect, they will cause problems in further operations. For example, CREATE TABLE AS SELECT will not correctly copy such CLOB columns. Also, after installation of the 8.1.7.3 server patchset the CLOB columns will not longer be legible. LONG columns are always stored in the database character set and thus they behave like CHAR/VARCHAR2 in respect to the character set change. BLOBs and BFILEs are binary raw datatypes and their processing does not depend on any Oracle character set setting. NCLOB Values and the National Character Set Change -------------------------------------------------- The above discussion about changing the database character set and exporting and importing CLOB values is theoretically applicable to the change of the national character set and to NCLOB values. But as varying width character sets are not supported as national character sets in Oracle8(i), changing the national character set from a fixed width character set to a varying width character set is not supported at all. Preparing CLOB Columns for the Character Set Change --------------------------------------------------- Take a backup of the database. If using Advanced Replication or deferred transactions functionality, make sure that there are no outstanding deferred transactions with CLOB parameters, i.e. DEFLOB view must have no rows with non-NULL CLOB_COL column; to make sure that replication environment remains consistent use only recommended methods of purging deferred transaction queue, preferably quiescing the replication environment. Then: - If changing the database character set from a fixed width character set to a varying with character set in Oracle 8.0.x, set all CLOB column values to NULL -- you are not allowed to use CLOB columns after the character set change. - If changing the database character set from a fixed width character set to a varying width character set in Oracle 8.1.5 or later, perform table-level export of all tables containing CLOB columns, including SYSTEM's tables. Set NLS_LANG to the old database character set for the Export utility. Then truncate these tables. Restoring CLOB Columns after the Character Set Change ----------------------------------------------------- In Oracle 8.1.5 or later, after changing the character set as described above (steps 3. to 6.), restore CLOB columns exported in step 2. by importing them back into the database. Set NLS_LANG to the old database character set for the Import utility to avoid IMP-16 errors and data loss. RELATED DOCUMENTS: ================== [NOTE:13856.1] V7: Changing the Database Character Set -- This note has limited distribution, please contact Oracle Support [NOTE:62107.1] The National Character Set in Oracle8 [NOTE:119164.1] Changing Database Character set - Valid Superset definitions [NOTE:118242.1] ALERT: Changing the Database or National Character Set Can Corrupt LOB Values <Note.158577.1> NLS_LANG Explained (How Does Client-Server Character Conversion Work?) [NOTE:140014.1] ALERT: Oracle8/8i to Oracle9i using New "AL16UTF16" [NOTE:159657.1] Complete Upgrade Checklist for Manual Upgrades from 8.X / 9.0.1 to Oracle9i (incl. 9.2) [NOTE:124721.1] Migrating an Applications Installation to a New Character Set Oracle8i National Language Support Guide Oracle8i Release 3 (8.1.7) Readme - Section 18.12 "Restricted ALTER DATABASE CHARACTER SET Command Support (CLOB and NCLOB)" Oracle8i Documentation Addendum, Release 3 (8.1.7) - Chapter 3 "New Character Set Scanner Utility" Oracle8i Application Developer's Guide - Large Objects (LOBs), Release 2 - Chapter 2 "Basic Components" Oracle8 Application Developer's Guide, Release 8.0 - Chapter 6 "Large Objects (LOBs)", Section "Introduction to LOBs" Oracle9i Globalization Guide, Release 1 (9.0.1) Oracle9i Database Globalization Guide, Release 2 (9.2) For further NLS / Globalization information you may start here: [NOTE:150091.1] Globalization Technology (NLS) Library index .
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    Best Regards,
    Xiaoming Yang
    Message was edited by:
            Xiaoming Yang

    Hello Experts,
    Any replies on this?
    I am also getting a similar kind of error.
    Do you have any idea on this?
    Thanks and Best Regards,
    Suresh

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