How to modify oracle database encoding

Method: 1. After closing the database, use "startup mount;" to start the database in mount mode; 2. Use the "alter system set job_queue_processes=0;..." statement to enable strict mode; 3. Use "alter "database character set internal_use encoding" to modify the encoding; 4. Restart the database.

The operating environment of this tutorial: Windows 10 system, Oracle 11g version, Dell G3 computer.

How to modify the oracle database encoding

Take ZHS16GBK -> AL32UTF8 as an example

1. Start the database first

If oracle If the service is running, there is no need to start it

startup;

Close the database

shutdown immediate;

Then start the database in mount mode

startup mount;

2. Enable strict mode

3. Encode

ALTER DATABASE CHARACTER SET AL32UTF8;

This may cause an error, prompting our character set: the new character set must be the old character set Superset, then we can skip the check of the superset and make changes:

ALTER DATABASE character set INTERNAL_USE AL32UTF8;

This statement is enough. The help provided by TERNAL_USE will allow Oracle to bypass the verification of the subset and superset. This The internal operation of this statement is exactly the same as that of the above statement.

4. Restart the database

Close the database

shutdown immediate;

Start the database

startup;

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