如何从SQL返回结果页面？

from flask import Flask, render_template
import sqlite3

app = Flask(__name__)

@app.route('/')
def index():
    # 连接到SQLite数据库
    conn = sqlite3.connect('example.db')
    cursor = conn.cursor()

    # 执行SQL查询语句
    cursor.execute('SELECT * FROM example_table')
    results = cursor.fetchall()

    # 关闭数据库连接
    cursor.close()
    conn.close()

    # 将查询结果传递给HTML模板
    return render_template('index.html', results=results)

if __name__ == '__main__':
    app.run(debug=True)