How to set utf8 encoding in oracle?

by cali_green , in category: MySQL , a month ago

How to set utf8 encoding in oracle?

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1 answer

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by gilbert , 25 days ago

@cali_green 

To set UTF-8 encoding in Oracle, follow these steps:

  1. Connect to your Oracle database as a user with administrative privileges (e.g. SYS or SYSTEM).
  2. Execute the following SQL statement to check the current character set of the database:
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SELECT * FROM nls_database_parameters WHERE parameter = 'NLS_CHARACTERSET';


  1. If the character set is not already set to UTF-8, you will need to convert the database to UTF-8. This can be done by performing a full database export/import with the CONVERT parameter set to AL32UTF8. Here's an example of how to perform the export using the expdp utility:
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expdp system/password@<database> DIRECTORY=DATA_PUMP_DIR DUMPFILE=export.dmp LOGFILE=export.log SCHEMAS=<list of schemas to export> ENCRYPTION_PASSWORD=<encryption password> ENCRYPTION_ALGORITHM=AES128 ENCRYPT_DATAPUMP=ALL


  1. Create a new database with the AL32UTF8 character set using the following SQL statement:
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CREATE DATABASE mydb CHARACTER SET AL32UTF8;


  1. Set the national character set to UTF-8 by executing the following SQL statement:
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ALTER DATABASE mydb NATIONAL CHARACTER SET AL16UTF16;


  1. Restart your Oracle database to apply the changes.


After completing these steps, your Oracle database should be set to use UTF-8 encoding. Make sure to test your database thoroughly to ensure that all data is properly stored and retrieved in UTF-8 format.