mpyw

<ul>
<li><a href="https://stackoverflow.com/a/50585389/1846562?stw=2" target="_blank" rel="nofollow noopener noreferrer">Answer: MYSQL: Query order by rand() very slow</a></li>
</ul>
<p><code>ORDER BY RAND()</code> のベターな書き方</p>


<p><code>LIMIT 1</code> でしか使えないのが難点</p>
