How to solve mysql garbled code

MySQL is a popular relational database management system. When using MySQL, some users may encounter garbled characters, which may negatively affect the normal operation of the program. In this article, we will explain to you what MySQL garbled is and how to fix it.

1. What is MySQL garbled code

MySQL garbled code is usually caused by incorrect character set settings or mismatched character sets. MySQL supports multiple character sets, such as UTF-8, GBK, GB2312, etc., but in actual use, the following situations may occur:

(1) The database character set and the data table character set are different;

(2) When the application connects to the MySQL database, the MySQL server does not correctly identify the client's character set.

These problems may cause garbled characters in the stored data. For example, when Chinese data is stored in a MySQL database, illegal characters such as "骥??" may appear.

2. Solution to MySQL garbled code

The method to solve the problem of MySQL garbled code is as follows:

2.1 Set the MySQL character set

In MySQL, Character set can be set at server level, database level or table level. The character set set at the server level will apply to all databases and tables. If you want to use a different character set in a specific database or table, you can specify the character set for each database and table.

When creating MySQL databases and tables, you can set the character set through the following command:

CREATE DATABASE database_name CHARACTER SET utf8;

CREATE TABLE table_name (
column1 datatype CHARACTER SET utf8,
column2 datatype CHARACTER SET utf8,
……);

2.2 Modify the MySQL connection character set

When connecting to the MySQL database, you need to Specify the correct connection character set to ensure that the MySQL server correctly recognizes the client's character set. If you are using PHP, you can use the following code to set the connection character set:

mysqli_set_charset($conn, "utf8");

where $conn is created when you connect to the MySQL database Connection variables. Setting the character set to utf8 ensures that the MySQL server handles all Unicode characters correctly.

If you are using another programming language, consult the documentation to learn how to set the character set.

2.3 Modify the MySQL configuration file

In addition to setting the character set when connecting to the MySQL database through the application, you can also modify the MySQL configuration file to set the default character set.

In Linux systems, the MySQL configuration file is usually located at /etc/mysql/my.cnf. In Windows systems, the MySQL configuration file is usually located in C:Program FilesMySQLMySQL Server 5.7my.ini.

In the configuration file, add the following line to set the default character set to utf8:

[client]
default-character-set=utf8

[mysql]
default-character-set=utf8

[mysqld]
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server=utf8

After restarting the MySQL service, the settings will take effect.

3. Summary

MySQL is a powerful relational database management system, but when used, you may encounter garbled characters. If you encounter a MySQL garbled problem, please follow the methods described in this article to solve it. By correctly setting the MySQL character set, connection character set, and configuration file, you can ensure that MySQL correctly handles various Unicode characters and optimize the user experience of the application.

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