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// application/index/controller/Index.php
namespace app\index\controller;

use think\Controller;
use app\index\model\Data;

class Index extends Controller {
    public function index() {
        $list = Data::all();
        // ´ËËæ´¦ÀíÊý¾ÝÇóºÍÅÅÃû
        $this->assign('list', $list);
        return $this->fetch();
    }
}

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// application/index/model/Data.php
namespace app\index\model;

use think\Model;

class Data extends Model {}

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$sum = 0;
foreach ($list as $item) {
    $sum += $item['field'];
}

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function cmp($a, $b) {
    if ($a['sum'] == $b['sum']) {
        return 0;
    }
    return $a['sum'] > $b['sum'] ? -1 : 1;
}
usort($list, "cmp");

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<table>
    <thead>
        <tr>
            <th>Ãû³Æ</th>
            <th>ÇóºÍЧ¹û</th>
            <th>ÅÅÃû</th>
        </tr>
    </thead>
    <tbody>
        {volist name="list" id="vo"}
            <tr>
                <td>{$vo.name}</td>
                <td>{$vo.sum}</td>
                <td>{$i++}</td>
            </tr>
        {/volist}
    </tbody>
</table>

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