Database character set

Hi gurus,

version of database-> 10.2.0.3
character-> US7ASCI
-> AL16UTF16 national character set

We can store unicode data in the nvarchar columns?

Thank you very much

Yes, NLS_LANG is also required for NCHAR, NVARCHAR2 data types.

See the following example

With wrong NLS_LANG:

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
PL/SQL Release 10.2.0.4.0 - Production
CORE    10.2.0.4.0      Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production

SQL> host echo $NLS_LANG
AMERICAN_AMERICA.US7ASCII

SQL> create table t(n nvarchar2(10));

Table created.

SQL> insert into t values(unistr('\00e5'));

1 row created.

SQL> select dump(n,1017) from t;

DUMP(N,1017)
--------------------------------------------------------------------------------
Typ=1 Len=2 CharacterSet=AL16UTF16: ^@,e5

SQL> select * from t;

N
----------
?

With right NLS_LANG:

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
PL/SQL Release 10.2.0.4.0 - Production
CORE    10.2.0.4.0      Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production

SQL> host echo $NLS_LANG
AMERICAN_AMERICA.WE8PC850

SQL> create table t(n nvarchar2(10));

Table created.

SQL> insert into t values(unistr('\00e5'));

1 row created.

SQL> select dump(n,1017) from t;

DUMP(N,1017)
--------------------------------------------------------------------------------
Typ=1 Len=2 CharacterSet=AL16UTF16: ^@,e5

SQL> select * from t;

N
----------
å

Tags: Database

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