https://my-blog.j8465383071.workers.dev/tags/%E9%A1%B9%E7%9B%AE/Recent content in 项目 on Kernel NotesHugo -- 0.147.7zh-cnFri, 14 Aug 2026 17:47:31 +0800https://my-blog.j8465383071.workers.dev/posts/projects/kkdb-1-preview/Tue, 21 Jan 2025 13:55:00 +0800https://my-blog.j8465383071.workers.dev/posts/projects/kkdb-1-preview/<h1 id="1-基本介绍">1 基本介绍</h1> <h2 id="要求">要求</h2> <ul> <li>数据库基本原理</li> <li>C语言</li> <li>数据结构</li> <li>操作系统</li> </ul> <h2 id="数据存储需求">数据存储需求</h2> <h2 id="数据存储方案">数据存储方案</h2> <ul> <li>文件</li> <li>excel</li> <li>数据库</li> </ul> <h1 id="2-kkdb">2 kkdb</h1> <h2 id="成果展示">成果展示</h2> <ul> <li> <p>初始化</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl"><span class="c1"># 系统表</span> </span></span><span class="line"><span class="cl">sys_class: 存储所有表 </span></span><span class="line"><span class="cl">sys_attr: 存储所有列 </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl">dbinit </span></span><span class="line"><span class="cl">ls ~/dbdata </span></span></code></pre></div></li> <li> <p>基本语法</p> <ul> <li> <p>CREATE</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">输入：CREATE TABLE t1 <span class="o">(</span>c1 INT, c2 TEXT<span class="o">)</span><span class="p">;</span> </span></span><span class="line"><span class="cl">语法解析：表名、列名、列数据类型 </span></span><span class="line"><span class="cl">系统表：存储表信息、列信息 </span></span><span class="line"><span class="cl">表文件：创建文件 </span></span></code></pre></div></li> <li> <p>INSERT</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">输入：INSERT INTO t1 VALUES <span class="o">(</span>1, <span class="s1">&#39;first&#39;</span><span class="o">)</span> </span></span><span class="line"><span class="cl">语法解析：表名、列数据 </span></span><span class="line"><span class="cl">数据处理：封装数据 </span></span><span class="line"><span class="cl">表文件：写入数据 </span></span></code></pre></div></li> <li> <p>SELECT</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">输入：SELECT * FROM t1 </span></span><span class="line"><span class="cl">语法解析：表名、列 </span></span><span class="line"><span class="cl">表文件：读取数据 </span></span><span class="line"><span class="cl">数据处理：解析数据 </span></span></code></pre></div></li> <li> <p>UPDATE</p> </li> <li> <p>DELETE</p> </li> <li> <p>DROP</p> </li> </ul> </li> <li> <p>并发访问</p> <ul> <li> <p>CS模式</p> <ul> <li> <p>服务器</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">dbserver start </span></span></code></pre></div></li> <li> <p>客户端</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">dbclient 127.0.0.1 <span class="m">8888</span> </span></span><span class="line"><span class="cl">SELECT * FROM t1<span class="p">;</span> </span></span></code></pre></div></li> </ul> </li> <li> <p>服务器多线程</p>