如何创建单独的列来标记星期几

import mysql.connector

# 连接到MySQL数据库
cnx = mysql.connector.connect(user='your_username', password='your_password',
                              host='your_host', database='your_database')

# 获取数据库游标
cursor = cnx.cursor()

# 在表中添加一个新列
alter_table_query = "ALTER TABLE your_table ADD COLUMN weekday VARCHAR(10)"
cursor.execute(alter_table_query)

import datetime

# 查询数据库中的日期列和ID列
select_query = "SELECT date_column, id_column FROM your_table"
cursor.execute(select_query)

# 更新每条记录的星期几标记
for date, id in cursor:
    weekday = datetime.datetime.strptime(date, "%Y-%m-%d").strftime("%A")
    update_query = "UPDATE your_table SET weekday = %s WHERE id_column = %s"
    cursor.execute(update_query, (weekday, id))

# 提交更改到数据库
cnx.commit()