Database Character Set Oracle Query

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• The sourcecharset argument is the name of the character set in which char is stored in the database. The default value is the database character set. Both the destination and source character set arguments can be either literals or columns containing the name of the character set.
• ORA-41400: Bind Character Set (1) Does Not Match Database Character Set (871) (Doc ID 1506516.1) Last updated on FEBRUARY 28, 2019. Applies to: Oracle Database - Enterprise Edition - Version 11.2.0.3 and later Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Cloud Machine - Version N/A and later.

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Contents of this Post

1. Query/Select All NLS Parameter
2. Change NLS_TERRITORY, NLS_LANGUAGE, NLS_CURRENCY, NLS_ISO_CURRENCY
3. Change Database CHARACTER SET

Find All CHARACTER SET,TERRITORY,LANGUAGE
SQL> select * from V$NLS_VALID_VALUES;
SQL> select * from V$NLS_VALID_VALUES where ISDEPRECATED='TRUE';
OR
SQL> select * from x$ksulv;
SQL> SHOW PARAMETER NLS_
OR
SQL> select * from v$nls_parameters; (Dynamic View)
OR
SQL> select * from NLS_DATABASE_PARAMETERS; (Static View)
Note :-



Note that the NLS_CURRENCY may not reflect as expected.
To print the correct CURRENCY value you need to set the below in UNIX/Windows Environment
export NLS_LANG='ENGLISH_UNITED KINGDOM.AL32UTF8' (In UNIX) (For UK)
Set NLS_LANG In Windows ::- The correct NLS_LANG in a Microsoft Windows Environment (Doc ID 179133.1)
Now You can see the NLS_CURRENCY = £ (Pound Sign) of UNITED KINGDOM.
£ 'POUND' Symbole Can be create using 'Alt + 156 (Num Pad)'
Change NLS_TERRITORY, NLS_LANGUAGE, NLS_CURRENCY, NLS_ISO_CURRENCY
Method I
Manually Change the Parameter
Backup current spfile and pfile in $ORACLE_HOME/dbs
SQL> Shut Immediate
Add below lines to pfile
*.NLS_TERRITORY ='UNITED KINGDOM'
*.NLS_LANGUAGE='ENGLISH'
*.NLS_ISO_CURRENCY='UNITED KINGDOM'
*.NLS_CURRENCY='#'
Start the DB with pfile
SQL> create spfile from pfile;
SQL> Shut immediate
SQL> Startup
Method II
OR Directly change in SPFILE and bounce the database.
ALTER SYSTEM SET NLS_TERRITORY ='UNITED KINGDOM' SCOPE=SPFILE;
ALTER SYSTEM SET NLS_LANGUAGE='ENGLISH' SCOPE=SPFILE;;
ALTER SYSTEM SET NLS_ISO_CURRENCY='UNITED KINGDOM' SCOPE=SPFILE;;
ALTER SYSTEM SET NLS_CURRENCY='#' SCOPE=SPFILE;
Method III
OR Use a LOGON TRIGGER to set those Parameters in Session level.
CREATE OR REPLACE TRIGGER sys.schema_nls_session_settings AFTER LOGON ON BOB.SCHEMA
BEGIN
execute immediate 'alter session set NLS_LANGUAGE='ENGLISH'';
execute immediate 'alter session set NLS_TERRITORY='UNITED KINGDOM'';
execute immediate 'alter session set NLS_CURRENCY='£'';
execute immediate 'alter session set NLS_ISO_CURRENCY='UNITED KINGDOM'';
END;
/
Change Database CHARACTER SET
SQL> SELECT VALUE$ FROM SYS.PROPS$ WHERE NAME = '%CHARACTERSET';
SQL> SELECT * FROM NLS_DATABASE_PARAMETERS WHERE PARAMETER LIKE '%CHARACTERSET';
PARAMETER VALUE
-------------------------------------- --------------------------------
NLS_CHARACTERSET WE8ISO8859P1
NLS_NCHAR_CHARACTERSET AL16UTF16
As a normal practice we are doing like below.
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
Memorize the value for below parameters
SQL> show parameter CLUSTER_DATABASE
SQL> sho parameter job_queue_processes

Database Character Set Oracle Query Mysql

SQL> sho parameter AQ_TM_PROCESSES
$ sqlplus / as sysdba
SQL> SHUTDOWN IMMEDIATE;
SQL> STARTUP MOUNT;
SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;
SQL> ALTER SYSTEM SET CLUSTER_DATABASE=FALSE SCOPE=SPFILE; -- For RAC Node Only
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
SQL> ALTER SYSTEM SET AQ_TM_PROCESSES=0;
SQL> ALTER DATABASE OPEN;
SQL> ALTER DATABASE CHARACTER SET INTERNAL_USE AL32UTF8;
SQL> SHU IMMEDIATE
SQL> STARTUP
SQL> SELECT VALUE FROM SYS.NLS_DATABASE_PARAMETERS WHERE PARAMETER='NLS_CHARACTERSET';

Oracle Database National Character Set Query

SQL> SELECT * FROM NLS_DATABASE_PARAMETERS WHERE PARAMETER LIKE '%CHARACTERSET';
VALUE
------------------
AL32UTF8
Change NLS_NCHAR_CHARACTERSET
SQL> SHUTDOWN IMMEDIATE;
SQL> STARTUP MOUNT;
SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;
SQL> ALTER SYSTEM SET CLUSTER_DATABASE=FALSE SCOPE=SPFILE; -- For RAC Node Only
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
SQL> ALTER SYSTEM SET AQ_TM_PROCESSES=0;
SQL> ALTER DATABASE OPEN;
SQL> ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE AL16UTF16;
SQL> SHUTDOWN IMMEDIATE
SQL> STARTUP
Reset The Parameter Settings
SQL> ALTER SYSTEM SET CLUSTER_DATABASE=TRUE SCOPE=SPFILE; -- For RAC Node Only
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=100;
SQL> ALTER SYSTEM SET AQ_TM_PROCESSES=0;
Note:-
If you are facing any issue in application after above CHARACTER SET change then go for below document and/or contact oracle support.

Database Character Set Oracle Query Example

Character Set Migration using CSSCAN and CSALTER (Doc ID 225912.1)

Database Character Set Oracle Query Database