How to solve the problem of garbled characters when importing Chinese data into Oracle?

Title: Methods and code examples to solve the problem of garbled Chinese data imported into Oracle

When importing Chinese data into Oracle database, garbled characters often occur, which may This is caused by incorrect database character set settings or encoding conversion problems during the import process. In order to solve this problem, we can take some methods to ensure that the imported Chinese data can be displayed correctly. The following are some solutions and specific code examples:

1. Check the database character set settings
In the Oracle database, the character set settings are very important for the import and display of Chinese data. If the character set of the database does not support Chinese, garbled characters will appear when importing Chinese data. You can check the character set settings of the current database through the following SQL statement:

SELECT * FROM nls_database_parameters WHERE parameter='NLS_CHARACTERSET';

If the character set does not support Chinese, you can consider changing the database character set to a character set that supports Chinese, such as AL32UTF8. For specific methods of modifying the character set, please refer to Oracle's official documentation.

2. Encoding conversion when importing data
When importing data, you can avoid garbled characters by specifying the appropriate encoding method. For example, you can use the convert() function when importing data to convert the data into a suitable encoding, such as UTF-8. The following is a sample code:

INSERT INTO table_name (col1, col2)
VALUES (convert('中文数据', 'UTF8'), convert('中文数据2', 'UTF8'));

In addition, if the data source is a CSV file, you can consider specifying the encoding format of the file when importing the data, such as UTF-8, to ensure that the data can be displayed correctly.

3. Modify the character set of the database session
When importing data, you can avoid garbled characters by modifying the character set of the database session. The character set of the session can be modified to UTF-8 through the following code example:

ALTER SESSION SET NLS_CHARACTERSET = 'UTF8';

In this way, all operations in the current session will use the UTF-8 character set to ensure the correct display of Chinese data.

To sum up, by checking the database character set settings, performing encoding conversion and modifying the database session character set, the problem of garbled characters when importing Chinese data into the Oracle database can be effectively solved. I hope the methods and code examples provided above can help you successfully import Chinese data and display it correctly.

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