mysql中设置默认字符编码为utf8

CREATE DATABASE mydatabase CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

ALTER DATABASE mydatabase CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

CREATE TABLE mytable (
    id INT PRIMARY KEY,
    name VARCHAR(255)
) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

ALTER TABLE mytable CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

import mysql.connector

config = {
    'user': 'your_user',
    'password': 'your_password',
    'host': 'your_host',
    'database': 'your_database',
    'charset': 'utf8mb4'
}

cnx = mysql.connector.connect(**config)

SHOW VARIABLES LIKE 'character_set_%';

import mysql.connector

config = {
    'user': 'your_user',
    'password': 'your_password',
    'host': 'your_host',
    'database': 'your_database',
    'charset': 'utf8mb4'
}

cnx = mysql.connector.connect(**config)
cursor = cnx.cursor()

query = "SELECT * FROM mytable"
cursor.execute(query)

for row in cursor:
    print(row)

cursor.close()
cnx.close()