MySQL是一種常用的關系型數據庫管理系統，而MySQL 8.0.13是最新版本。對于數據庫管理員來說，建立my.ini文件是十分重要的，下面我們來看如何建立。

首先，在MySQL的安裝目錄下找到my-default.ini文件，并復制它，修改文件名為my.ini，然后你就可以在這個文件中配置MySQL的屬性了。以下是my.ini的內容示例：

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html
[mysqld]
# Set the default character set.
# 配置默認字符集
character-set-server=utf8mb4
# The default authentication plugin to be used when connecting to the MySQL
# server. Used for all new accounts when no authentication plugin is
# specified. This value will be ignored if skip-grant-tables is set and not
# as a command-line argument.
#
# Because this plugin implements authentication over unencrypted connections,
# it is only used for initially setting up accounts or for situations where
# secure connections are not possible. By default, we assign you the sha256_password
# for Windows and sha256_password socket authentication methods. On other
# platforms, we assign you the mysql_native_password authentication method.
# 安全配置
default_authentication_plugin=sha256_password
# Enable or disable logging.
# 日志
general_log=0
log-output=FILE
general_log_file="C:/mysql/MySQL Server 8.0/Logs/mysql.log"
slow_query_log=0
slow_query_log_file="C:/mysql/MySQL Server 8.0/Logs/slowquery.log"
long_query_time=10
# The size of the buffer used for index blocks for MyISAM tables.
# myisam 配置，忽略
key-buffer-size=8M
# The TCP/IP Port the MySQL Server will listen on
# 監聽端口
port=3306
# Switch to UNIX_SOCKET on Unix-like systems
# socket 配置，忽略
socket=mysql
[mysql]
no-beep
[mysqldump]
quick
quote-names
max_allowed_packet=32M
[isamchk]
key_buffer=20M
sort_buffer_size=20M
read_buffer=2M
write_buffer=2M

配置好my.ini文件后，將其放到MySQL的數據目錄下，即可重啟MySQL，生效修改。建立好my.ini文件后，管理員就可以進行MySQL的各項配置了。