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    <title>Vector Database on ByF (BaiFan) · Daily Deep Think</title>
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      <title>PostgreSQL &#43; pgvector in Docker: A Complete Setup Guide</title>
      <link>https://blog.baifan.site/en/postgresql-pgvector-docker-installation-guide/</link>
      <pubDate>Tue, 02 Sep 2025 14:00:00 +0800</pubDate>
      <author>blog@baifan.site (ByF (BaiFan))</author>
      <guid>https://blog.baifan.site/en/postgresql-pgvector-docker-installation-guide/</guid>
      <description>&lt;h1 class=&#34;relative group&#34;&gt;🐘 Installing and Deploying PostgreSQL + pgvector in Docker&#xA;    &lt;div id=&#34;-installing-and-deploying-postgresql--pgvector-in-docker&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#-installing-and-deploying-postgresql--pgvector-in-docker&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h1&gt;&#xA;&lt;p&gt;This article shows how to quickly deploy a PostgreSQL database with the &lt;strong&gt;pgvector&lt;/strong&gt; extension in a &lt;strong&gt;Docker Compose&lt;/strong&gt; environment, so your local or development setup can support vector retrieval and AI applications (LangChain, RAG, semantic search, and the like).&lt;/p&gt;&#xA;&lt;hr&gt;&#xA;&#xA;&lt;h2 class=&#34;relative group&#34;&gt;📦 1. Prepare the Environment&#xA;    &lt;div id=&#34;-1-prepare-the-environment&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#-1-prepare-the-environment&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h2&gt;&#xA;&lt;p&gt;Make sure your system has:&lt;/p&gt;</description>
      
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      <title>RAG Complete Guide: Build a Local RAG System from Scratch</title>
      <link>https://blog.baifan.site/en/rag-system-complete-guide-langchain-ollama-pgvector/</link>
      <pubDate>Wed, 27 Aug 2025 14:00:00 +0800</pubDate>
      <author>blog@baifan.site (ByF (BaiFan))</author>
      <guid>https://blog.baifan.site/en/rag-system-complete-guide-langchain-ollama-pgvector/</guid>
      <description>&lt;h1 class=&#34;relative group&#34;&gt;Building a Local RAG with LangChain + Ollama + pgvector: A Complete Hands-On Walkthrough from 0 to 1 (with uv Dependency Management and an Interview Guide)&#xA;    &lt;div id=&#34;building-a-local-rag-with-langchain--ollama--pgvector-a-complete-hands-on-walkthrough-from-0-to-1-with-uv-dependency-management-and-an-interview-guide&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#building-a-local-rag-with-langchain--ollama--pgvector-a-complete-hands-on-walkthrough-from-0-to-1-with-uv-dependency-management-and-an-interview-guide&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h1&gt;&#xA;&lt;blockquote&gt;&lt;p&gt;This post is a directly actionable document. Follow it top to bottom and you will build a local RAG (retrieval-augmented generation) system from scratch and understand the key concepts and code. All core scripts come with comments to make learning and interview review easier.&lt;/p&gt;</description>
      
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