Explore the causes and solutions of garbled Chinese characters in MySQL

MySQL is an open source relational database management system, which is one of the most commonly used database management systems in web applications. However, some MySQL users encounter a common problem during use: garbled Chinese characters. This article will introduce the causes and solutions of garbled Chinese characters in MySQL.

1. Reasons for garbled Chinese characters in MySQL

There are many reasons for garbled Chinese characters in MySQL. The following are the most common reasons:

1. Character set mismatch

MySQL supports multiple character sets, such as UTF-8, GBK, etc. If the character set in the database does not match the character set of the connected client, garbled Chinese characters will appear.

2. The character set setting of the connecting client is wrong

If the character set setting of the client connecting to MySQL is wrong, Chinese characters will also be garbled.

3. The encoding format of the data inserted into the database is incorrect

If the encoding format of the data inserted into the database is incorrect, garbled Chinese characters will also appear.

2. Methods to solve the problem of garbled Chinese characters in MySQL

1. Modify the default character set of MySQL

Modify the default character set of MySQL to UTF-8, which can be effective Avoid the problem of garbled Chinese characters. The modification method is as follows:

Add the following configuration in the MySQL configuration file my.ini:

[client]
default-character-set=utf8

[mysqld]
character-set-server=utf8

2. Modify the character set of the database

Modify the character set of the database to UTF-8, which can effectively solve the problem of garbled Chinese characters.

First create a database in MySQL:

CREATE DATABASE mydatabase CHARACTER SET utf8 COLLATE utf8_general_ci;

where "mydatabase" is the name of the database that needs to be created, and CHARACTER SET specifies the database The character set used, utf8_general_ci means using the UTF-8 character set.

Next, you also need to specify the character set when creating the data table:

CREATE TABLE mytable (
id INT NOT NULL PRIMARY KEY,
name VARCHAR(30) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

where ENGINE=InnoDB sets the storage engine of the table to InnoDB, and DEFAULT CHARSET=utf8 specifies the character set of the table to UTF-8.

3. Modify the character set of the connection client

Setting the character set of the client connected to MySQL to UTF-8 can effectively solve the problem of garbled Chinese characters. The modification method is as follows:

Add the following parameters when connecting to MySQL:

mysql -h localhost -u root -p --default-character-set=utf8

where- -default-character-set=utf8 can set the client character set to UTF-8.

4. Modify the application encoding

If the character set of MySQL has been set to UTF-8, but the problem of garbled Chinese characters still occurs, it may be that the encoding setting of the application is incorrect. question. You can set the application encoding to UTF-8, or convert the encoding to UTF-8 to resolve the issue.

Summary:

MySQL Chinese character garbled problem is a common problem, but through reasonable settings, this problem can be effectively avoided. In actual use, it is necessary to choose the corresponding solution according to the specific situation. If you encounter other problems, you can solve them by searching for MySQL official documentation or consulting professional technical personnel.

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