# DataWarehouse
> 全站第一份数据仓库的学习资料
在经历了公司部门向中台的转变,BI到数据平台的开发,数据仓库向数据湖的过渡,突然有了想法总结下。历经一年准备,终于把平时遇到的知识点整理起来,结合自己的实际经验输出一下。
## 数据仓库
### 1. 数仓建设
- [个人杂谈](./docs/me.md)
- [数据仓库的定义](./docs/数仓定义.md)
- [从零开始搭建数据仓库](./docs/从零开始搭建数据仓库.md)
- [数仓建设的十大陷阱](./docs/数仓建设的十大陷阱.md)
- [维度建模](./docs/数据模型.md)
- [数据模型如何评论好坏](./docs/数据模型如何评论好坏.md)
- [实时数仓](./docs/实时数仓.md)
- [数据库和数据仓库, OLTP和OLAP](./docs/数据库和数据仓库的区别.md)
- [数据湖](./docs/数据湖.md)
- [数据中台](./docs/数据中台.md)
- [商务智能——BI](./docs/bi.md)
- 指标体系
- 数据质量
- 工作流
### 2. 调优
- [SQL规范](./docs/sql规范.md)
- [explain 慢sql查询](./docs/explain.md)
- [数据倾斜调优/SQL调优](./docs/sql调优.md)
- [HiveSQL优化案例](./docs/HiveSQL.md)
- [Shuffle调优](./docs/shuffle.md)
### 3. OLAP引擎
- [OLAP引擎分类](./docs/olap.md)
- [Kudu](./docs/kudu.md)
- [Presto、Impala与Hive](./docs/presto_impala_hive.md)
- [clickHouse]()
## 用户画像
### 1. 用户画像开发流程
### 2. 技术架构
### 3. 总结
- [工程总结](./docs/画像总结.md)
- [技术总结]()
没有合适的资源?快使用搜索试试~ 我知道了~
数据仓库建模中常见的挑战及解决方案探讨
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数仓建模 1. 数仓架构的原则: 底层业务的数据驱动为导向同时结合业务需求驱动 便于数据分析 屏蔽底层复杂业务 简单、完整、集成的将数据暴露给分析层 底层业务变动与上层需求变动对模型冲击最小化 业务系统变化影响削弱在基础数据层(资金订单改造) 结合自上而下的建设方法削弱需求变动对模型的影响 数据水平层次清晰化 高内聚松耦合 主题之内或各个完整意义的系统内数据的高内聚 主题之间或各个完整意义的系统间数据的松耦合 构建仓库基础数据层 使得底层业务数据整合工作与上层应用开发工作相隔离,为仓库大规模开发奠定基础 仓库层次更加清晰,对外暴露数据更加统一 数仓模型不只是考虑如何设计和实现功能,设计原则应该从访问性能、数据成本、使用成本、数据质量、扩展性来考虑。如何搭建一个好的数据仓库: 数仓设计的3个维度: 2. 主流建模方法 当前主流建模方法为:ER模型、维度模型。 ER模型常用于OLTP数据库建模,应用到构建数仓时更偏重数据整合, 站在企业整体考虑,将各个系统的数据按相似性一致性、合并处理,为数据分析、决策服务,但并不便于直接用来支持分析。
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