Oracle11g: how I change character set to AL32UTF8?

Hi, a software is requiring to have a database with AL32UTF8 character set.
For what I understand I have an instance of db with
nls_language=american
I tried:
SQL> alter database character set AL32UTF8;
alter database character set AL32UTF8
ERROR at line 1:
ORA-12712: new character set must be a superset of old character set
what's wrong? How can I achieve this?
Thanks a lot.
Warning: you are talking with a non expert. :)

802428 wrote:
Hi schavali,
I am new bee to oracle and BPM so i am unable to get which database you are talking about to drop & recreate and also how to do so.
Any help over this will be highly appreciable.
Regards,
ITM CrazyWe are referring to OP's database (where the characterset is set to WE8MSWIN1252)
Srini

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Here are the following details of National Language Parameter Value
Before
NLS_CALENDAR     GREGORIAN
NLS_CHARACTERSET     AL32UTF8 (IS this multibyte (UTF-8) character set SARAH?)
NLS_COMP     BINARY
NLS_CURRENCY     $
NLS_DATE_FORMAT     DD-MON-RR
NLS_DATE_LANGUAGE     AMERICAN
NLS_DUAL_CURRENCY     $
NLS_ISO_CURRENCY     AMERICA
NLS_LANGUAGE     AMERICAN
NLS_LENGTH_SEMANTICS     BYTE
NLS_NCHAR_CHARACTERSET     AL16UTF16
NLS_NCHAR_CONV_EXCP     FALSE
NLS_NUMERIC_CHARACTERS     .,
NLS_SORT     BINARY
NLS_TERRITORY     AMERICA
NLS_TIMESTAMP_FORMAT     DD-MON-RR HH.MI.SSXFF AM
NLS_TIMESTAMP_TZ_FORMAT     DD-MON-RR HH.MI.SSXFF AM TZR
NLS_TIME_FORMAT     HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT     HH.MI.SSXFF AM TZR
After
NLS_CALENDAR     GREGORIAN
NLS_CHARACTERSET     AL32UTF8
NLS_COMP     BINARY
NLS_CURRENCY     ر.س.
NLS_DATE_FORMAT     DD/MM/RR
NLS_DATE_LANGUAGE     ARABIC
NLS_DUAL_CURRENCY     ر.س.
NLS_ISO_CURRENCY     SAUDI ARABIA
NLS_LANGUAGE     ARABIC
NLS_LENGTH_SEMANTICS     BYTE
NLS_NCHAR_CHARACTERSET     AL16UTF16
NLS_NCHAR_CONV_EXCP     FALSE
NLS_NUMERIC_CHARACTERS     .,
NLS_SORT     ARABIC
NLS_TERRITORY     SAUDI ARABIA
NLS_TIME_FORMAT     HH12:MI:SSXFF PM
NLS_TIMESTAMP_FORMAT     DD/MM/RR HH12:MI:SSXFF PM
NLS_TIMESTAMP_TZ_FORMAT     DD/MM/RR HH12:MI:SSXFF PM TZR
NLS_TIME_TZ_FORMAT     HH12:MI:SSXFF PM TZR
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hi my database character set is non-AL32UTF8 HOW can i change this to be AL32UTF8 am in database 11g
SQL> select * from v$nls_parameters where parameter like '%CHARACTERSET%';
PARAMETER
VALUE
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NLS_NCHAR_CHARACTERSET
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ERROR at line 1:
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Warning: Function created with compilation errors.
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ORA-06550: line 21, column 8:
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ERROR at line 1:
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ERROR at line 1:
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Variable Size             373293520 bytes
Database Buffers          155189248 bytes
Redo Buffers                5804032 bytes
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ERROR at line 1:
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Hi,
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I'm using an Oracle 10g, XE database, which has a database character set set to AL32UTF8, what causes that some characters like "č ť ř ..." are not displayed.
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Changing the NLS_CHARACTERSET to AL32UTF8 / UTF8 (Unicode)          [Document 260192.1]
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Oracle11g: how I change character set to AL32UTF8?

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