How to solve garbled code in sqlplus

SQLPlus garbled characters are caused by character set mismatch. Solution: 1. Set the NLS_LANG environment variable; 2. Use client tools that support character sets; 3. Modify the SQLPlus startup script; 4. Modify the database configuration; 5. Use JDBC connection to explicitly set the character set; ensure that the character set is set in Be consistent across databases, client tools, and code.

How to solve SQLPlus garbled code

Cause:

SQLPlus garbled code Usually caused by character set mismatch.

Solution:

1. Use the NLS_LANG environment variable

• Set the NLS_LANG environment variable and specify the database to use character set and locale.
• For example: NLS_LANG=AMERICAN_AMERICA.UTF8

2. Use client tools

• Use a client that supports the specified character set Terminal tools such as SQL Developer or DBeaver.
• When connecting, select a character set that matches the database.

3. Modify the SQLPlus startup script

• Edit the SQLPlus startup script (such as sqlplus.bat or sqlplus.sh).
• Add the following lines:

<code>SET NLS_LANG=AMERICAN_AMERICA.UTF8</code>

• Replace AMERICAN_AMERICA.UTF8 with the actual character set of the database.

4. Modify the database configuration

• If the above method does not work, you need to modify the database configuration.
• Change the database character set using the following command:

<code>ALTER DATABASE CHARACTER SET utf8;</code>

• Restart the database for the changes to take effect.

5. Use JDBC to connect

• If you use JDBC to connect to the database, you can explicitly set the character set:

<code class="java">connection.setClientInfo("キャラクタセット", "utf8");</code>

Note:

• Make sure the database, client tools, and character set settings all match.
• If the garbled characters still exist, please try a different character set.
• If all else fails, you may need to contact your database administrator for further assistance.

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