How to set utf8 encoding in oracle?

@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.