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sunionstore.html
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<div class="section" id="sunionstore-destination-key-key">
<span id="sunionstore"></span><h1>SUNIONSTORE destination key [key …]<a class="headerlink" href="#sunionstore-destination-key-key" title="Permalink to this headline">¶</a></h1>
<blockquote>
<div><div class="line-block">
<div class="line">可用版本： >= 1.0.0</div>
<div class="line">时间复杂度: O(N)， <code class="docutils literal"><span class="pre">N</span></code> 是所有给定集合的成员数量之和。</div>
</div>
</div></blockquote>
<p>这个命令类似于 <a class="reference internal" href="sunion.html#sunion"><span class="std std-ref">SUNION key [key …]</span></a> 命令，但它将结果保存到 <code class="docutils literal"><span class="pre">destination</span></code> 集合，而不是简单地返回结果集。</p>
<p>如果 <code class="docutils literal"><span class="pre">destination</span></code> 已经存在，则将其覆盖。</p>
<p><code class="docutils literal"><span class="pre">destination</span></code> 可以是 <code class="docutils literal"><span class="pre">key</span></code> 本身。</p>
<div class="section" id="id1">
<h2>返回值<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h2>
<p>结果集中的元素数量。</p>
</div>
<div class="section" id="id2">
<h2>代码示例<a class="headerlink" href="#id2" title="Permalink to this headline">¶</a></h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">redis</span><span class="o">></span> <span class="n">SMEMBERS</span> <span class="n">NoSQL</span>
<span class="mi">1</span><span class="p">)</span> <span class="s2">"MongoDB"</span>
<span class="mi">2</span><span class="p">)</span> <span class="s2">"Redis"</span>
<span class="n">redis</span><span class="o">></span> <span class="n">SMEMBERS</span> <span class="n">SQL</span>
<span class="mi">1</span><span class="p">)</span> <span class="s2">"sqlite"</span>
<span class="mi">2</span><span class="p">)</span> <span class="s2">"MySQL"</span>
<span class="n">redis</span><span class="o">></span> <span class="n">SUNIONSTORE</span> <span class="n">db</span> <span class="n">NoSQL</span> <span class="n">SQL</span>
<span class="p">(</span><span class="n">integer</span><span class="p">)</span> <span class="mi">4</span>
<span class="n">redis</span><span class="o">></span> <span class="n">SMEMBERS</span> <span class="n">db</span>
<span class="mi">1</span><span class="p">)</span> <span class="s2">"MySQL"</span>
<span class="mi">2</span><span class="p">)</span> <span class="s2">"sqlite"</span>
<span class="mi">3</span><span class="p">)</span> <span class="s2">"MongoDB"</span>
<span class="mi">4</span><span class="p">)</span> <span class="s2">"Redis"</span>
</pre></div>
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