NLS_LANG in case of Japanese data

Question

Hi,
My DB NLS Charset is AMERICAN_AMERICA.AL32UTF8 and NLS_LENGTH_SEMANTICS is BYTE. I am working with Japanese Kanji, Kana Data. I am storing japanese data into VARCHAR2. I am using SQL*LOADER to load japanese data into Oracle Tables.
When I upload data using SQLLDR with NLS_LANG=AMERICAN_AMERICA.AL32UTF8 then I am facing Data Too Large Exception. But When I upload data with NLS_LANG=AMERICAN_AMERICA.JA16SJIS then my data is uploaded successfully.
Please tell me AMERICAN_AMERICA.JA16SJIS is perfect charset to upload data into oracle tables?
If not then please tell me how to upload japanese data using AMERICAN_AMERICA.AL32UTF8 charset.
My DB Table is given below:
CREATE TABLE TEST_KANJI
DATA_TEST1 VARCHAR2(5 CHAR),
DATA_TEST2 VARCHAR2(5 CHAR)
);

Answer 1

Thanks orafad.
Actually.. Our database is AL32UTF8 compatible. We are using SQL LOADER to upload japanese data into database. Our DB NLS_LENGTH_SEMANTICS is BYTE TYPE.
Our NLS_LANG contains AMERICAN_AMERICA.AL32UTF8. Now we perform following operations:
QL> CREATE TABLE TEST_SJIS_CHAR
2 (
3 data_1 VARCHAR2(3 CHAR),
4 data_2 VARCHAR2(3 CHAR)
5 );
Table created.
SQL> CREATE TABLE TEST_SJIS_BYTE
2 (
3 data_1 VARCHAR2(3 BYTE),
4 data_2 VARCHAR2(3 BYTE)
5 );
Table created.
SQL> INSERT INTO test_sjis_char VALUES('私金魚','私金魚');
INSERT INTO test_sjis_char VALUES('私金魚','私金魚')
ERROR at line 1:
ORA-12899: value too large for column "ODIDEV"."TEST_SJIS_CHAR"."DATA_1"
(actual: 4, maximum: 3)
SQL> INSERT INTO test_sjis_byte VALUES('私金魚','私金魚');
INSERT INTO test_sjis_byte VALUES('私金魚','私金魚')
ERROR at line 1:
ORA-12899: value too large for column "ODIDEV"."TEST_SJIS_BYTE"."DATA_1"
(actual: 6, maximum: 3)
SQL> INSERT INTO test_sjis_byte VALUES('金魚魚','魚金魚');
INSERT INTO test_sjis_byte VALUES('金魚魚','魚金魚')
ERROR at line 1:
ORA-12899: value too large for column "ODIDEV"."TEST_SJIS_BYTE"."DATA_1"
(actual: 6, maximum: 3)
SQL> INSERT INTO test_sjis_char VALUES('金魚魚','魚金魚');
INSERT INTO test_sjis_char VALUES('金魚魚','魚金魚')
ERROR at line 1:
ORA-12899: value too large for column "ODIDEV"."TEST_SJIS_CHAR"."DATA_1"
(actual: 4, maximum: 3)
Now we change our client NLS_LANG=AMERICAN_AMERICA.JA16SJIS. Now we perform following operations:
SQL> CREATE TABLE TEST_SJIS_CHAR
2 (
3 data_1 VARCHAR2(3 CHAR),
4 data_2 VARCHAR2(3 CHAR)
5 );
Table created.
SQL> CREATE TABLE TEST_SJIS_BYTE
2 (
3 data_1 VARCHAR2(3 BYTE),
4 data_2 VARCHAR2(3 BYTE)
5 );
Table created.
SQL> INSERT INTO test_sjis_char VALUES('私金魚','私金魚');
1 row created.
SQL> INSERT INTO test_sjis_byte VALUES('私金魚','私金魚');
INSERT INTO test_sjis_byte VALUES('私金魚','私金魚')
ERROR at line 1:
ORA-12899: value too large for column "ODIDEV"."TEST_SJIS_BYTE"."DATA_1"
(actual: 9, maximum: 3)
SQL> INSERT INTO test_sjis_byte VALUES('金魚魚','魚金魚');
INSERT INTO test_sjis_byte VALUES('金魚魚','魚金魚')
ERROR at line 1:
ORA-12899: value too large for column "ODIDEV"."TEST_SJIS_BYTE"."DATA_1"
(actual: 9, maximum: 3)
SQL> INSERT INTO test_sjis_char VALUES('金魚魚','魚金魚');
1 row created.
SQL> SELECT length(data_1), length(data_2) FROM test_sjis_char;
LENGTH(DATA_1) LENGTH(DATA_2)
3 3
3 3
SQL> SELECT length(data_1), length(data_2) FROM test_sjis_byte;
no rows selected
SQL>
SQL> SELECT lengthb(data_1), lengthb(data_2) FROM test_sjis_char;
LENGTHB(DATA_1) LENGTHB(DATA_2)
9 9
9 9
SQL> SELECT lengthb(data_1), lengthb(data_2) FROM test_sjis_byte;
no rows selected
SQL> SELECT data_1 || data_2 from test_sjis_char;
DATA_1||DATA
私金魚私金魚
金魚魚魚金魚
SQL> SELECT data_1 || data_2 from test_sjis_byte;
no rows selected.
Actually We want to take a final decission on charset. But we need strong reason to finalize it. Please help me out to solve this issue.