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文章 2024-08-31 来自：开发者社区

SQL中的索引类型：深入解析数据库性能优化的关键

在数据库管理系统中，索引是提高数据检索效率的一种关键技术。它们类似于书籍的目录，允许数据库快速找到数据行而无需扫描整个表。SQL中的索引可以采取多种形式，每种形式都有其特定的用途和优势。本文将详细介绍SQL中不同类型的索引，包括它们的定义、特点、创建方法以及在数据库性能优化中的作用。 1. 索引的基本概念索引是数据库表中一个或多个列的数据...

文章 2023-07-24 来自：开发者社区

MySQL 数据结构优化与索引细节解析：打造高效数据库的优化秘笈（三）

查找最频繁出现的城市前缀，先从 5 字符前缀开始，发现比原来出现的次数更多，可以分别截取多个字符，查看城市出现的次数频率mysql> select count(*) as cnt,left(city,5) as pref from citydemo group by pref order by cnt desc limit 10; +-----+-------+ | cnt | pref ....

文章 2023-07-24 来自：开发者社区

MySQL 数据结构优化与索引细节解析：打造高效数据库的优化秘笈（二）

索引匹配方式关于 explain 关键字各个列描述可以阅读：MySQL 内置的监控工具介绍及使用篇首先创建好表结构，并设置好对应的索引CREATE TABLE `member` ( `id` bigint(10) not null primary key auto_increment, `nick_name` varchar(32) not null default '' comment...

文章 2023-07-24 来自：开发者社区

MySQL 数据结构优化与索引细节解析：打造高效数据库的优化秘笈（一）

前言在上篇博文：构建优化之城：MySQL 数据建模、数据类型优化与索引常识全面解析提到了数据建模方案及数据类型的优化方案，简要说明了一些索引的基本知识及分类、技术名词，该篇博文会从以下几点来对 MySQL 调优部分进行分析：索引数据结构、优化细节大数据量查询优化海量数据解耦优化处理数据结构InnoDB、MyISAM 存储引擎底层索引使用的 B+ Tree，Memory 存储引擎使用的 hash....

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