# 数据库
- 数据库操作
```
<pre class="calibre14">```
use Illuminate\Support\Facades\DB<span class="token2">;</span>
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">select</span><span class="token2">(</span><span class="token4">"select * from users where name=?"</span><span class="token2">,</span><span class="token2">[</span><span class="token4">'admin'</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span> <span class="token6">//也支持name=:name,[':name'=>'admin']绑定,返回obj</span>
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">insert</span><span class="token2">(</span><span class="token4">'insert into users (id, name) values (?, ?)'</span><span class="token2">,</span> <span class="token2">[</span><span class="token3">1</span><span class="token2">,</span> <span class="token4">'Dayle'</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span>
$affected <span class="token">=</span> DB<span class="token2">:</span><span class="token2">:</span><span class="token1">update</span><span class="token2">(</span><span class="token4">'update users set votes = 100 where name = ?'</span><span class="token2">,</span> <span class="token2">[</span><span class="token4">'John'</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span> 返回影响行数
$deleted <span class="token">=</span> DB<span class="token2">:</span><span class="token2">:</span><span class="token1">delete</span><span class="token2">(</span><span class="token4">'delete from users'</span><span class="token2">)</span><span class="token2">;</span>返回影响行数
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">statement</span><span class="token2">(</span><span class="token4">'drop table users'</span><span class="token2">)</span><span class="token2">;</span> 其他无返回语句
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">transaction</span><span class="token2">(</span><span class="token5">function</span> <span class="token2">(</span><span class="token2">)</span> <span class="token2">{</span> 事务
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">'users'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">update</span><span class="token2">(</span><span class="token2">[</span><span class="token4">'votes'</span> <span class="token">=</span><span class="token">></span> <span class="token3">1</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span>
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">'posts'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">delete</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span>
<span class="token2">}</span><span class="token2">)</span><span class="token2">;</span>
$list <span class="token">=</span> DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">"users"</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">get</span><span class="token2">(</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">toArray</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span><span class="token6">//获取全部转换成数组</span>
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">"users"</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">first</span><span class="token2">(</span><span class="token2">)</span> 获取一行
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">"users"</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">value</span><span class="token2">(</span><span class="token4">'email'</span><span class="token2">)</span><span class="token2">;</span> 获取一个字段
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">"users"</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">pluck</span><span class="token2">(</span><span class="token4">'email'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">toArray</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span> 获取一列<span class="token2">,</span>如果设置两个<span class="token1">pluck</span><span class="token2">(</span><span class="token4">'name'</span><span class="token2">,</span><span class="token4">'id'</span><span class="token2">)</span> id是键name是值的键值数组
<span class="token1">count</span><span class="token2">(</span><span class="token2">)</span> 结果集数量 <span class="token1">max</span><span class="token2">(</span><span class="token4">'price'</span><span class="token2">)</span>最大值 <span class="token1">min</span><span class="token2">(</span><span class="token4">'price'</span><span class="token2">)</span>最小值 <span class="token1">avg</span><span class="token2">(</span><span class="token4">'price'</span><span class="token2">)</span>平均数 <span class="token1">sum</span><span class="token2">(</span><span class="token4">'price'</span><span class="token2">)</span>求和
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">'users'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">select</span><span class="token2">(</span><span class="token4">'name'</span><span class="token2">,</span> <span class="token4">'email as user_email'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">get</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span> 返回特定字段
<span class="token1">whereRaw</span><span class="token2">(</span><span class="token4">'price > IF(state = "TX", ?, 100)'</span><span class="token2">,</span> <span class="token2">[</span><span class="token3">200</span><span class="token2">]</span><span class="token2">)</span> 原生where
<span class="token1">orderBy</span><span class="token2">(</span><span class="token4">'name'</span><span class="token2">,</span> <span class="token4">'desc'</span><span class="token2">)</span> <span class="token1">inRandomOrder</span><span class="token2">(</span><span class="token2">)</span>随机排序
<span class="token1">join</span><span class="token2">(</span><span class="token4">'contacts'</span><span class="token2">,</span> <span class="token4">'users.id'</span><span class="token2">,</span> <span class="token4">'='</span><span class="token2">,</span> <span class="token4">'contacts.user_id'</span><span class="token2">)</span> 内连接
<span class="token1">leftJoin</span><span class="token2">(</span><span class="token4">'posts'</span><span class="token2">,</span> <span class="token4">'users.id'</span><span class="token2">,</span> <span class="token4">'='</span><span class="token2">,</span> <span class="token4">'posts.user_id'</span><span class="token2">)</span> 左连接
<span class="token1">groupBy</span><span class="token2">(</span><span class="token4">'account_id'</span><span class="token2">)</span> 分组 <span class="token1">groupBy</span><span class="token2">(</span><span class="token4">'first_name'</span><span class="token2">,</span> <span class="token4">'status'</span><span class="token2">)</span>
<span class="token1">having</span><span class="token2">(</span><span class="token4">'account_id'</span><span class="token2">,</span> <span class="token4">'>'</span><span class="token2">,</span> <span class="token3">100</span><span class="token2">)</span> 刷选
<span class="token1">take</span><span class="token2">(</span><span class="token3">5</span><span class="token2">)</span> 返回<span class="token3">5</span>条
<span class="token">-</span><span class="token">></span><span class="token1">offset</span><span class="token2">(</span><span class="token3">10</span><span class="token2">)</span> <span class="token">-</span><span class="token">></span><span class="token1">limit</span><span class="token2">(</span><span class="token3">5</span><span class="token2">)</span> 限制
<span class="token1">insert</span><span class="token2">(</span> <span class="token2">[</span><span class="token4">'email'</span> <span class="token">=</span><span class="token">></span> <span class="token4">'john@example.com'</span><span class="token2">,</span> <span class="token4">'votes'</span> <span class="token">=</span><span class="token">></span> <span class="token3">0</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span> 插入 支持多条数据
$id<span class="token">=</span>DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">"users"</span><span class="token2">)</span><span class="token">-</span><span class="token">></span> <span class="token1">insertGetId</span><span class="token2">(</span> <span class="token2">[</span><span class="token4">'email'</span> <span class="token">=</span><span class="token">></span> <span class="token4">'john@example.com'</span><span class="token2">,</span> <span class="token4">'votes'</span> <span class="token">=</span><span class="token">></span> <span class="token3">0</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span> 插入后返回id
<span class="token1">update</span><span class="token2">(</span><span class="token2">[</span><span class="token4">'votes'</span> <span class="token">=</span><span class="token">></span> <span class="token3">1</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span> 更新
<span class="token1">increment</span><span class="token2">(</span><span class="token4">'votes'</span><span class="token2">,</span> <span class="token3">5</span><span class="token2">)</span><span class="token2">;</span><span class="token1">decrement</span><span class="token2">(</span><span class="token4">'votes'</span><span class="token2">,</span> <span class="token3">5</span><span class="token2">)</span><span class="token2">;</span>自增自减
<span class="token1">increment</span><span class="token2">(</span><span class="token4">'votes'</span><span class="token2">,</span> <span class="token3">1</span><span class="token2">,</span> <span class="token2">[</span><span class="token4">'name'</span> <span class="token">=</span><span class="token">></span> <span class="token4">'John'</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span> 支持其他字段更新
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">'users'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">truncate</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span> 清空表
DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">'users'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">where</span><span class="token2">(</span><span class="token4">'votes'</span><span class="token2">,</span> <span class="token4">'>'</span><span class="token2">,</span> <span class="token3">100</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">delete</span><span class="token2">(</span><span class="token2">)</span><span class="token2">;</span> 删除
$users <span class="token">=</span> DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">'users'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">paginate</span><span class="token2">(</span><span class="token3">15</span><span class="token2">)</span><span class="token2">;</span> 分页
$users <span class="token">=</span> DB<span class="token2">:</span><span class="token2">:</span><span class="token1">table</span><span class="token2">(</span><span class="token4">'users'</span><span class="token2">)</span><span class="token">-</span><span class="token">></span><span class="token1">simplePaginate</span><span class="token2">(</span><span class="token3">15</span><span class="token2">)</span><span class="token2">;</span> 简单分页只有上一页下一页
$results<span class="token">-</span><span class="token">></span><span class="token1">total</span><span class="token2">(</span><span class="token2">)</span> 总页数
<span class="token"><</span>div class<span class="token">=</span><span class="token4">"container"</span><span class="token">></span>
@foreach <span class="token2">(</span>$users as $user<span class="token2">)</span>
<span class="token2">{</span><span class="token2">{</span> $user<span class="token">-</span><span class="token">></span>name <span class="token2">}</span><span class="token2">}</span>
@endforeach
<span class="token"><</span><span class="token">/</span>div<span class="token">></span>
<span class="token2">{</span><span class="token2">{</span> $users<span class="token">-</span><span class="token">></span><span class="token1">links</span><span class="token2">(</span><span class="token2">)</span> <span class="token2">}</span><span class="token2">}</span>
```
```
- redis
```
<pre class="calibre16">```
use Illuminate\Support\Facades\Redis<span class="token2">;</span>
Redis<span class="token2">:</span><span class="token2">:</span><span class="token1">get</span><span class="token2">(</span><span class="token4">'id'</span><span class="token2">)</span><span class="token2">;</span>
Redis<span class="token2">:</span><span class="token2">:</span><span class="token1">set</span><span class="token2">(</span><span class="token4">'name'</span><span class="token2">,</span> <span class="token4">'Taylor'</span><span class="token2">)</span><span class="token2">;</span>
Redis<span class="token2">:</span><span class="token2">:</span><span class="token1">command</span><span class="token2">(</span><span class="token4">'set'</span><span class="token2">,</span> <span class="token2">[</span><span class="token4">'name'</span><span class="token2">,</span><span class="token3">34</span><span class="token2">]</span><span class="token2">)</span><span class="token2">;</span> 支持所有原生
```
```
- 简介
- 第一章 数据库
- Mysql/mariadb
- 函数
- 基础
- 增删改索引
- 标准查询
- 高级查询
- TIDB集群mysql解决方案
- Redis
- 语言基础
- 5种数据类型
- 其他类型
- Sqlite
- 语言基础
- 常用查询
- 第二章 PHP
- 语言基础
- 第一课 流程控制和运算
- 第二课 数组
- 第三课 日期时间
- 第四课 常用函数
- 第五课 字符串
- 第六课 文件操作
- 第七课 面向对象
- 第八课 正则表达式
- 第九课 图片处理生成
- 第十课 curl/memche
- 第十一课 mysql和pdo
- 第十三课 cookie和session
- 第十四课 xml操作
- 第十五课 php5.3+新特性
- 第十六课 php7+
- 第十七课 密码安全
- 废弃函数
- php命令行
- redis应用
- 算法
- 排序算法
- 基础算法
- 无限级分类
- 自定义函数Fn
- 查找算法
- 自定义函数数据函数fn
- laravel
- 路由
- 常用语句
- 数据库
- dingo/api
- Yii2
- 控制器
- 常用类
- 数据库
- redis
- thinkphp6
- TP6文档
- TP6插件
- dedecms
- 织梦标签大全
- 数据库操作
- 内置函数和定义函数
- 织梦核心改动
- 织梦插件/底层标签开发
- PHP相关工具
- composer
- php开发环境phpenv
- Phpstorm使用
- windows编译php扩展
- PHP开源库
- 开源项目管理禅道
- sns_auth
- php-casbin权限控制
- php-jwt
- 微信SDKeasywechat
- querylist采集库
- workerman
- Box/Spout处理excel和csv
- dll扩展
- redis/memche/xdebug
- redis
- Lua
- php_xlswriter
- event
- swoole
- 常用代码库
- 微擎框架
- 第一课全局变量
- 第二课常用函数
- 第三课自定义微擎独有函数
- 第四课数据库操作
- 第五课微信端回复
- 第六课微擎高级操作
- 第八课global函数列表
- mainfest.xml详解
- js方法
- 人人商城
- 第一课model解读
- 第二课常用语句解读
- 第三课常用js解读
- 第四课附录常见问题
- 第五课附录处理报表|支付
- 常用JSON状态码
- 第三章 JavaScript
- js基础
- 浏览器对象
- 语言基础
- html5接口
- ES6新语法
- vue
- 基础语法
- 京东vueUI组件
- uniapp
- 组件开发规范
- nodejs
- 基础知识
- 安装node
- nvm不同版本node切换
- js常用标准库
- zepto/jquery
- weui
- js图标库
- elementUI
- validator表单验证
- layer弹出层
- requirejs
- wow动画
- 动画animate
- swiper4
- 百度编辑器
- flyio/axios/qs
- jquery.form
- bootstrap3
- clipboard复制
- slideout侧滑
- imagehover.css图片悬停动画
- webpack打包
- Bulma UI框架
- store 客户端存储
- lottie动画创建库
- sweetalert
- js自定义函数
- 常见JSSDK
- 微信公众号JSSDK
- 腾讯地图jssdk
- 微信小程序
- 第四章 编程语言
- markdown语言
- Dart语言
- Dart语言基础
- Flutter框架
- Lua语言
- 字符串,数组,表
- 自定义方法
- go语言
- 第1.1语言基本语法
- 第1.2流程控制
- 第1.3函数
- 第1.4结构体
- 第1.5接口
- 第1.6包
- go语言框架Gin
- CSS3语言
- CSS与CSS3
- 选择符
- 属性
- css3
- loading动画
- HTML5语言
- less
- sass
- C#
- 基础知识
- 函数
- 第五章 开发工具
- git
- nginx/apache服务器
- Linux常用操作
- crontab定时任务
- 注册表与cmd
- 阿里云ECS
- frp穿透和ssl续期
- 宝塔安装
- 树莓派
- 浏览器模拟
- 火狐/chrome常用插件
- WSL安装使用
- mac brew和终端命令
- win10相关