mysql displays garbled characters

MySQL is an open source relational database management system widely used in the development of web applications. MySQL supports multiple character sets, such as UTF-8, ISO-8859-1, GB2312, etc. When we query the database, if garbled characters appear, it may be due to the following reasons:

1. The application encoding is inconsistent with the database encoding.
2. The database character set does not support the language used.
3. The field contains unrecognized characters.

For these reasons, we can take the following measures to solve the problem of MySQL displaying garbled characters:

1. Set the MySQL character set

In MySQL , you can set the default character set and temporary character set. The default character set is set when MySQL starts, while the temporary character set is set in the session. If the default character set is inconsistent with the encoding used by the application, garbled characters will appear during queries. You can set the MySQL character set through the following command:

SET NAMES utf8;

where utf8 means that MySQL uses UTF-8 encoding. This command allows you to set a temporary character set in the session.

2. Modify the MySQL configuration file

If there is still a garbled problem, you can modify the MySQL configuration file my.cnf. Find the following lines and modify them:

[client]
default-character-set = utf8mb4

[mysql]
default-character-set = utf8mb4

[mysqld]
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci

Among them, utf8mb4 is the largest character set supported by MySQL and can support all Unicode characters including Emoji. collation-server is MySQL's collation rule and can be modified as needed.

3. Check the field content

Sometimes the query results appear garbled, possibly because the field content contains unrecognized characters. Data in the database can be checked and irregular data repaired.

Summary

The above are several methods to solve the problem of MySQL displaying garbled characters. When using MySQL, pay attention to setting the correct character set and sorting rules to avoid garbled characters. At the same time, attention should also be paid to checking the integrity and standardization of data to avoid garbled data caused by non-standard data. These tips can allow us to better use MySQL and improve the efficiency and accuracy of data query and management.

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