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How to Store Japanese Character In Oracle?

6 minutes read

To store Japanese characters in Oracle, you need to ensure that the database is configured to support Unicode encoding, specifically UTF-8 or UTF-16. This will allow Oracle to store and retrieve Japanese characters without any issues.


When creating a table in Oracle, you should define the character set for the column that will store Japanese characters as either AL32UTF8 for UTF-8 encoding or AL16UTF16 for UTF-16 encoding. This will ensure that the database can correctly store and handle the Japanese characters.


Additionally, when inserting or updating data in Oracle, make sure to use NCHAR, NVARCHAR2, or NCLOB data types for columns that will store Japanese characters. These data types are specifically designed to handle Unicode data, including Japanese characters.


By following these steps and configuring Oracle to use the appropriate character set and data types, you can effectively store and retrieve Japanese characters in your database.


How to configure client applications to support Japanese characters stored in Oracle?

To configure client applications to support Japanese characters stored in Oracle, you can follow the steps below:

  1. Ensure that the client application's character set is configured to support Japanese characters. This can typically be done by setting the NLS_LANG parameter in the client application's environment variables or configuration settings. Set the NLS_LANG parameter to a value that includes the character set for the Japanese language, such as 'JAPANESE_JAPAN.AL32UTF8'.
  2. Make sure that the Oracle database is configured to store and retrieve Japanese characters correctly. You can set the database character set to a value that supports Japanese characters, such as AL32UTF8.
  3. Verify that the tables and columns in the database are configured to store Japanese characters. You can use the NVARCHAR2 data type to store Unicode characters, which includes Japanese characters.
  4. Update the client application's SQL queries to handle Japanese characters properly. Make sure that the queries use the appropriate character set encoding when working with Japanese characters.
  5. Test the client application to ensure that it correctly displays and handles Japanese characters stored in the Oracle database. If there are any issues, review the configuration settings and make any necessary adjustments.


By following these steps, you can configure client applications to support Japanese characters stored in Oracle effectively.


How to migrate data with Japanese characters to Oracle?

To migrate data with Japanese characters to Oracle, you can follow these steps:

  1. Ensure that the database character set of the Oracle database supports Japanese characters. You can check the current database character set by running the following query in Oracle SQL*Plus:
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SELECT * FROM nls_database_parameters WHERE parameter='NLS_CHARACTERSET';


If the character set is not already set to one that supports Japanese characters (such as AL32UTF8), you may need to modify the database character set. This should be done carefully as it can have significant impact on the existing data in the database.

  1. Export the data from the original source database. This can be done using a data migration tool or script that exports data in a format that Oracle can import. Make sure that the exported data includes the Japanese characters in the correct encoding.
  2. Prepare the Oracle database for data import. This may involve creating tables, indexes, and any other necessary database objects to receive the imported data.
  3. Use Oracle's data import tools, such as SQL*Loader or Oracle Data Pump, to import the data into the Oracle database. Make sure to specify the correct character set encoding for the data being imported, especially if the data contains Japanese characters.
  4. Verify that the data has been successfully migrated and that the Japanese characters are displayed correctly in the Oracle database.


By following these steps, you should be able to successfully migrate data with Japanese characters to Oracle.


What is the supported character sets for storing Japanese characters in Oracle?

Oracle supports two character sets for storing Japanese characters:

  1. AL32UTF8: This is a Unicode-based character set that supports all characters from all languages, including Japanese. It is recommended for storing Japanese characters as well as characters from other languages.
  2. JA16EUC: This is a character set specifically designed for Japanese characters. It is based on the EUC-JP encoding scheme and can only store Japanese characters.


How to set up character set encoding for Japanese in Oracle?

To set up character set encoding for Japanese in Oracle, you can follow these steps:

  1. You need to have the necessary language and character set files installed on your Oracle database server. Make sure that the Oracle Universal Installer has been used to install the necessary files for the desired language.
  2. Connect to your Oracle database as a user with DBA privileges.
  3. Check the current character set encoding of your database by running the following SQL query: 
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SELECT * FROM V$NLS_PARAMETERS WHERE PARAMETER IN ('NLS_CHARACTERSET', 'NLS_NCHAR_CHARACTERSET');


  1. If the current character set encoding does not support Japanese characters, you will need to change it to a Japanese-compatible character set. One commonly used character set for Japanese is AL32UTF8, which supports Unicode characters.
  2. To change the character set encoding to AL32UTF8, you can use the following steps: 
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SHUTDOWN IMMEDIATE;
STARTUP MOUNT;
ALTER SYSTEM ENABLE RESTRICTED SESSION;
ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
ALTER SYSTEM SET AQ_TM_PROCESSES=0;
ALTER DATABASE OPEN;
ALTER DATABASE CHARACTER SET AL32UTF8;
SHUTDOWN IMMEDIATE;
STARTUP;


  1. After changing the character set encoding, you can verify the changes by running the same SQL query mentioned in step 3.
  2. You may need to restart your Oracle database for the changes to take effect.


By following these steps, you can successfully set up character set encoding for Japanese in your Oracle database.


How to ensure compatibility with other systems when storing Japanese characters in Oracle?

  1. Understand the character encoding used for storing Japanese characters in Oracle. Oracle supports the Unicode character set, which includes Japanese characters. Ensure that the database and client have appropriate character set settings to handle Japanese characters.
  2. Use NVARCHAR2 data type for columns that will store Japanese characters. NVARCHAR2 is a Unicode data type that supports multi-byte characters, making it suitable for storing Japanese characters.
  3. Set the NLS_LANG parameter in the Oracle database to specify the language and character set settings. For Japanese characters, use a language setting of 'JAPANESE_JAPAN.AL32UTF8'.
  4. When developing applications that interact with the Oracle database, ensure that the client applications also support Unicode and are configured to handle Japanese characters. The application should be able to properly display, input, and process Japanese text.
  5. Test the compatibility of the system by storing and retrieving Japanese characters in the Oracle database. Check that the characters are displayed correctly and that there are no issues with data corruption or loss.
  6. Regularly monitor and maintain the character encoding settings in the Oracle database to ensure consistent compatibility with other systems. Address any issues promptly to prevent data integrity problems with Japanese characters.


What is the syntax for inserting Japanese characters into Oracle?

To insert Japanese characters into an Oracle database, you need to ensure that the character set of the database supports Japanese characters. You can use the following syntax to insert Japanese characters into Oracle:

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INSERT INTO table_name (column_name) VALUES ('日本語のテキスト');


Make sure that the column in which you are inserting the Japanese characters is of an appropriate data type to store the characters (such as NVARCHAR2). Additionally, ensure that the database character set is set to a Unicode character set that supports Japanese characters, such as AL32UTF8.


You may also need to set the NLS_LANG parameter to the appropriate language and character set before inserting Japanese characters into Oracle.

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