数据仓库范式-阿里云

一篇文章搞懂数据仓库：四种常见数据模型（维度模型、范式模型等）

前言写在前面大数据时代，维度建模已成为各大厂的主流方式。维度建模从分析决策的需求出发构建模型，为分析需求服务。重点关注用户如何快速的完成数据分析，可以直观的反应业务模型中的业务问题，需要大量的数据预处理、数据冗余，有较好的大规模复杂查询的响应性能。正文一、为什么要进行数据仓库建模？性能：良好的模型能...

一篇文章搞懂数据仓库：三范式与反范式

前言范式是符合某一种级别的关系模式的集合。构造数据库必须遵循一定的规则。在关系数据库中，这种规则就是范式。关系数据库中的关系必须满足一定的要求，即满足不同的范式。大数据生态中，各类强大的查询引擎层出不穷，相对廉价的磁盘和分布式技术，也让数据冗余变得可接受甚...

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数据仓库3级范式(3NF)基础

一、引言　　最近在整理理大数据模式下的数据仓库数据模型，资料来自互联网和读过的数据仓库理论和实践相关。二、3NF （1）1NF-无重复的列　　数据库表的每一列都是不可分割的基本数据项，同一列中不能有多个值，即实体中的某个属性不能有多个值或者不能有重复的属性。　　如果出现重复的属性，就可能需要...

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云原生数据仓库 AnalyticDB MySQL版是一种支持高并发低延时查询的新一代云原生数据仓库，全面兼容MySQL协议以及SQL：2003 语法标准，可以对海量数据进行即时的多维分析透视和业务探索，快速构建企业云上数据仓库。

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