<p>I found these questions on meta.SO: </p>

<ul>
<li><a href="http://meta.stackexchange.com/questions/91086/where-can-you-discuss-or-ask-for-comments-on-a-data-explorer-query">Where can you discuss or ask for comments on a data explorer query?</a></li>
<li><a href="http://meta.stackexchange.com/questions/107137/where-do-i-ask-questions-about-data-explorer">Where do I ask questions about data explorer?</a></li>
</ul>

<p>Based on the answers provided there, it seems that <a href="http://meta.stackoverflow.com/">meta.SO</a> is the place for asking questions like that and that (<a href="http://meta.stackexchange.com/questions/tagged/data-explorer">data-explorer</a>) is recommended tag for such questions.</p>