How to solve the problem of garbled data inserted into MySQL

Garbled characters appear when inserting data into MySQL, which is a problem that many developers will encounter. This article will introduce the causes of MySQL garbled characters and how to solve the problem of MySQL inserting garbled data.

1. Causes of garbled characters

MySQL inserts data into garbled characters, mainly due to the following reasons:

(1) MySQL character set encoding Inconsistency

If the character set encoding used by MySQL and the application is inconsistent, garbled characters will occur.

(2) The character set encoding of the table and the field is inconsistent

If the character set encoding of the table and field is inconsistent, garbled characters will appear when MySQL inserts data.

(3) MySQL’s default character set encoding

MySQL’s default character set encoding is latin1. If the character set encoding is not specified when creating a database or table, garbled characters will appear.

2. How to solve the problem of garbled data inserted into MySQL

In response to the above problems, there are the following solutions:

(1) Modify the MySQL character set encoding

You can modify MySQL's character set encoding by modifying MySQL's my.cnf configuration file to make it consistent with the character set encoding used by the application. For example, add the following content to the my.cnf configuration file:

[mysqld]
character-set-server = utf8

After restarting the MySQL service, the MySQL character set encoding will be modified to utf8.

(2) Modify the character set encoding of tables and fields

By modifying the character set encoding of tables and fields, keep it consistent with the character set encoding used by MySQL and applications. For example, change the character set encoding of the table to utf8:

ALTER TABLE table_name CONVERT TO CHARACTER SET utf8;

Change the character set encoding of the field to utf8:

ALTER TABLE table_name MODIFY field_name VARCHAR(100) CHARACTER SET utf8;

(3) Specify the default character set encoding of MySQL

Character set encoding can be specified when creating a database or table. For example, specify the character set encoding when creating the database:

CREATE DATABASE database_name DEFAULT CHARACTER SET utf8;

Specify the character set encoding when creating the table:

CREATE TABLE table_name (
    id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
    name VARCHAR(32) NOT NULL DEFAULT '',
    PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Through the above method, you can effectively solve the problem of garbled data inserted into MySQL.

Summary

MySQL inserts garbled data, which is caused by inconsistent MySQL character set encoding, inconsistent character set encoding of tables and fields, MySQL's default character set encoding, etc. To solve this problem, you can modify the MySQL character set encoding, modify the character set encoding of tables and fields, and specify the default character set encoding of MySQL. In the actual development process, you need to pay attention to the character set encoding settings to avoid garbled characters.

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