MySQL で毎日の注文数の累計を計算するにはどうすればよいですか?

<code class="language-sql">SELECT DAYOFYEAR(`date`) AS d, COUNT(*) AS daily_count
FROM `orders`
WHERE `hasPaid` > 0
GROUP BY d
ORDER BY d</code>

<code class="language-sql">SET @running_total:=0;
SELECT
    q1.d,
    q1.daily_count,
    (@running_total := @running_total + q1.daily_count) AS running_total
FROM
    (SELECT
        DAYOFYEAR(`date`) AS d,
        COUNT(*) AS daily_count
    FROM `orders`
    WHERE `hasPaid` > 0
    GROUP BY d
    ORDER BY d) AS q1;</code>