3.6 Инфоблоки - Оптимизация выборки

&lt;div style=&quot;text-align:right&quot;&gt;&lt;b&gt;К этому уроку нет материалов&lt;/b&gt;&lt;/div&gt; &lt;p&gt;&lt;b&gt;Оптимизация выборки - Часть 1&lt;/b&gt;&lt;/p&gt; &lt;!-- &lt;iframe width=&quot;560&quot; height=&quot;315&quot; src=&quot;https://www.youtube.com/embed/rFdtqWWdwa8&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt; --&gt; &lt;iframe src=&quot;https://vk.com/video_ext.php?oid=-211967493&id=456239543&hash=2ae9a2f0e525c27d&hd=2&quot; width=&quot;560&quot; height=&quot;315&quot; allow=&quot;autoplay; encrypted-media; fullscreen; picture-in-picture;&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt; &lt;br&gt;&lt;br&gt; &lt;p class=&quot;less-part-name&quot;&gt;&lt;b&gt;Оптимизация выборки - Часть 2-&lt;/b&gt;&lt;/p&gt; &lt;!-- &lt;iframe width=&quot;560&quot; height=&quot;315&quot; src=&quot;https://www.youtube.com/embed/hJH99_S3TT0&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt; --&gt; &lt;iframe src=&quot;https://vk.com/video_ext.php?oid=-211967493&id=456239545&hash=e67b4e8a75d5dc6c&hd=2&quot; width=&quot;560&quot; height=&quot;315&quot; allow=&quot;autoplay; encrypted-media; fullscreen; picture-in-picture;&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt; &lt;br&gt;&lt;br&gt; &lt;p class=&quot;less-part-name&quot;&gt;&lt;b&gt;Оптимизация выборки - Часть 3&lt;/b&gt;&lt;/p&gt; &lt;!-- &lt;iframe width=&quot;560&quot; height=&quot;315&quot; src=&quot;https://www.youtube.com/embed/ar4aGuqbtqI&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt; --&gt; &lt;iframe src=&quot;https://vk.com/video_ext.php?oid=-211967493&id=456239546&hash=f97cc051833af8d3&hd=2&quot; width=&quot;560&quot; height=&quot;315&quot; allow=&quot;autoplay; encrypted-media; fullscreen; picture-in-picture;&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt; &lt;br&gt;&lt;br&gt; &lt;p class=&quot;less-part-name&quot;&gt;&lt;b&gt;Оптимизация выборки - Часть 4&lt;/b&gt;&lt;/p&gt; &lt;!-- &lt;iframe width=&quot;560&quot; height=&quot;315&quot; src=&quot;https://www.youtube.com/embed/I5aQrja1wz0&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt; --&gt; &lt;iframe src=&quot;https://vk.com/video_ext.php?oid=-211967493&id=456239550&hash=a8950ad0356d8682&hd=2&quot; width=&quot;560&quot; height=&quot;315&quot; allow=&quot;autoplay; encrypted-media; fullscreen; picture-in-picture;&quot; frameborder=&quot;0&quot; allowfullscreen&gt;&lt;/iframe&gt;