zk_html/diary/2007-05-24-18:41:25.html

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<h1>Zk | Hmf.</h1>
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<p><span class="tag">diary</span> <span class="tag">livejournal</span> <span class="tag">fossils</span></p>
<p>Never used <code>JOIN</code>s before, so can someone tell me if I&rsquo;m doing this right?</p>
<p><code>SELECT wcmsVertices.*, wcmsDiffs.modifer, wcmsDiffs.mtime, wcmsDiffs.reason FROM wcmsVertices RIGHT JOIN wcmsDiffs USING (id) WHERE wcmsVerticies.id = &lsquo;$vertex&rsquo; ORDER BY wcmsDiffs DESC LIMIT 1;</code></p>
<p>I want to select everything from wcmsVertices and the three specified fields from wcmsDiffs where the &lsquo;id&rsquo; fields are both equal to $vertex. If there&rsquo;s more than one Diff, though, I want to only grab the most recent one</p>
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<p>Page generated on 2007-05-24 18:41:25</p>
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