What is the reason why the data exported by mysql is garbled? How to deal with it?

MySQL is a very popular relational database management software. It has the characteristics of efficiency, stability and security, and is widely used in various application scenarios. However, sometimes when we export data in MySQL, we encounter garbled characters, resulting in data that cannot be stored, transmitted, and processed correctly. Therefore, this article aims to introduce the causes and solutions of garbled MySQL export data and help readers effectively solve this problem.

1. The reason why the exported data is garbled

1. MySQL character set is incorrectly set:
   MySQL has multiple character sets, such as utf8, gbk, latin1, etc., with different characters The character encodings corresponding to the sets are different. If the character set of MySQL is set incorrectly or does not match the character set of the application or operating system, the exported data will be garbled.
2. Encoding format does not match when exporting data:
   When exporting data, MySQL will convert the data to the specified encoding format. If the encoding format of the exported data does not match the encoding format of the imported data, it may Garbled characters appear. For example, exporting gbk-encoded data to a file in utf8-encoded format will cause garbled characters.
3. Incorrect character set settings in the application:
   The application also has character set settings. If the application's character set settings are incorrect, garbled characters will appear when exporting data using MySQL.

2. Solution

In response to the above reasons that lead to garbled data, we can take the following measures to solve it:

1. Set the MySQL character set:
   In MySQL, you can use the following two commands to set the character set:

set character_set_client=utf8;
set character_set_connection=utf8;

These two commands will set the character set of both the client and the connection to utf8 to ensure that MySQL is consistent with the application Or the character set of the operating system is consistent. Before exporting data, you must ensure that the character set of MySQL is set correctly.

2. Check the export data encoding format:
   When exporting data, it is very important to choose the correct encoding format. For example, if you want to export gbk-encoded data to a file in utf8 encoding format, you need to select the utf8 encoding format during the process of exporting the data. If you choose an incorrect encoding format, it will cause data garbled problems.
3. Set the application character set:
   When using the application to export data, you also need to set the character set. Applications generally have character set setting options. You can set the character set to be the same as MySQL in the settings to ensure that the character set is consistent.
4. Use the transcoding tool:
   If the data is garbled, you can use the transcoding tool to convert the garbled data into normal data. For example, on the Windows platform, you can use the Notepad editor to convert the file encoding format to the correct format.

In short, if you encounter the problem of garbled characters when using MySQL to export data, you can start from the character set settings, encoding format check, application character set settings and transcoding tools to find out. Root cause of the problem and correct it. This can effectively solve the problem of garbled data exported by MySQL.

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