What is mysql character set

MySQL character set refers to the character encoding system used to store and process text data. It defines the set of characters that can be used in the database and how each character is represented in the computer. MySQL supports multiple character sets , including common character sets such as UTF-8, Latin1, etc., as well as other language-specific character sets. The character set determines the range of characters that the database can store and process, including supported languages ​​and special characters.

Operating system for this tutorial: Windows 10 system, MySQL 8 version, Dell G3 computer.

MySQL character set (Character Set) refers to the character encoding system used to store and process text data. It defines the set of characters that can be used in the database, and how each character is represented in the computer.

MySQL supports multiple character sets, including common character sets such as UTF-8, Latin1, etc., as well as other language-specific character sets. The character set determines the range of characters that the database can store and process, including supported languages ​​and special characters.

When creating a database or table, you can specify a specific character set. For example, you can use the following statement to create a table using the UTF-8 character set:

CREATE TABLE table_name (
    column_name VARCHAR(100)
) CHARACTER SET utf8;

In this way, the column_name column in the table will be stored using the UTF-8 character set.

Character sets can be set separately at the database level, table level and column level. If a character set is not specified explicitly, the default character set of the database, table, or server is used.

The character set not only affects the way data is stored, but also affects the behavior of string comparison, sorting, indexing and other operations. Therefore, when choosing a character set, you need to consider the type of data you want to store, the source of the data, and the needs of your application.

You can use the following SQL statements to query and modify the character set settings of the MySQL server, database, table and column:

-- 查询服务器字符集
SHOW VARIABLES LIKE 'character_set_server';
-- 查询数据库的字符集
SHOW CREATE DATABASE database_name;
-- 查询表的字符集
SHOW CREATE TABLE table_name;
-- 修改表的字符集
ALTER TABLE table_name CONVERT TO CHARACTER SET utf8;

In short, the MySQL character set is used to define the characters that can be stored and processed in the database. Character encoding system, very important for multi-language support and data correctness. Choosing a character set that suits your application needs is an important aspect of database design.

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