本文转自:https://fideloper.com/laravel-raw-queries Business logic is often complicated. Because of this, we often need to write our own SQL queries. Luckily, Laravel's query builder has the tools we need to safely run such queries. A key concern when wri…

原文 Executing Raw SQL Queries using Entity Framework While working with Entity Framework developers mostly use LINQ to Entities to query database. However, at times you may need to execute raw queries against the database. A common scenario is when yo…

前言:说到应对大流量.高并发的解决方案的时候,总会有这样的回答,如:读写分离,主从复制...等,数据库层今天先不讨论,那么今天我们就来看看怎么在应用层实现读写分离. 框架:laravel5.7(所有配置本人亲测) 说明: Laravel默认将 select 的语句让 read 指定的数据库执行,insert/update/delete 则交给 write 指定的数据库,达到读写分离的作用. 这些设置对原始查询 raw queries,查询生成器 query builder,以及对象映射 Eloq…

Raw queries原始查询 就是使用了原始的查询语句,如UPDATE users SET y = 42 WHERE x = 12 As there are often use cases in which it is just easier to execute raw / already prepared SQL queries, you can utilize the function sequelize.query. 当经常有使用更简单的执行原始/已经准备好的SQL查询的情况出现时,你…

http://v3.golaravel.com/docs/ 目录 Laravel概览 更新日志 安装与设置 系统需求 安装 服务器设置 基本设置 环境 友好的链接(URL) 路由 基础 通配符(Wildcards) 404事件(The 404 Event) 过滤器(Filters) 模式过滤器(Pattern Filters) 全局过滤器(Global Filters) 路由组(Route Groups) 命名路由(Named Routes) HTTPS路由(HTTPS Routes) 扩展包路…

Introduction Retrieving Results Aggregates Selects Joins Unions Where Clauses Advanced Where Clauses Ordering, Grouping, Limit, & Offset Inserts Updates Deletes Pessimistic Locking Introduction The database query builder provides a convenient, fluent…

简介 运行原生SQL查询  监听查询事件 数据库事务 使用多数据库连接 简介 Laravel makes connecting with databases and running queries extremely simple across a variety of database back-ends using either raw SQL, the fluent query builder, and the Eloquent ORM. Currently, Laravel suppor…

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最近在使用MongoDB的时候,遇到了使用多个关键词进行模糊查询的场景.竹风使用的是mongoengine库. 查了各种资料,最后总结出比较好用的方法.先上代码,后面进行详细说明.如下: #!/usr/bin/env python #coding:utf-8 import re import mongoengine from mongoengine import * mongoengine.register_connection('default', 'test', host='127.0.0.…

创建索引: import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.nio.charset.StandardCharsets; import java.util.D…