我的查询{{ SUM(something) }}出现错误。
于飞：

{% for stock in portfolio %}
            <tr>
                <td>{{ stock.symbol }}</td>
                <td>{{ stock.name }}</td>
                <td>{{ "stock.SUM(shares)" }}</td>
                <td>{{ stock.price }}</td>
                <td>{{ stock.SUM(total) }}</td>
            </tr>
            {% endfor %}

查询：

portfolio = db.execute("SELECT DISTINCT symbol, name, SUM(shares), price, SUM(total) FROM history GROUP BY name;")

return render_template("index.html", portfolio = portfolio)

stock.SUM(shares)和stock.SUM(total)会产生此错误：
jinja2.exceptions.UndefinedError:'dict object'没有属性'SUM'