如何在messagebox中显示数据库值

import tkinter as tk
from tkinter import messagebox
import mysql.connector

mydb = mysql.connector.connect(
  host="数据库主机地址",
  user="用户名",
  password="密码",
  database="数据库名"
)

mycursor = mydb.cursor()
mycursor.execute("SELECT * FROM 表名")
result = mycursor.fetchall()

messagebox.showinfo("数据库值", str(result))

import tkinter as tk
from tkinter import messagebox
import mysql.connector

def show_database_values():
    mydb = mysql.connector.connect(
      host="数据库主机地址",
      user="用户名",
      password="密码",
      database="数据库名"
    )
    
    mycursor = mydb.cursor()
    mycursor.execute("SELECT * FROM 表名")
    result = mycursor.fetchall()
    
    messagebox.showinfo("数据库值", str(result))

root = tk.Tk()
root.geometry("200x200")

button = tk.Button(root, text="显示数据库值", command=show_database_values)
button.pack()

root.mainloop()