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Update 3.数据建模.md
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baolibin committed Jan 11, 2024
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数据仓库建模阶段划分:业务建模、概念建模、逻辑建模、物理建模

##### 9、数据仓库建模规范?
命名规范:表、字段、字典类型
命名规范:表、字段、字段类型
分层规范:明确每层存储,注意依赖深度

##### 10、什么是数据湖?
数据湖是一个集中式存储库,允许你以任意规模存储所有结构化和非结构化数据。

##### 11、数据仓库数据回溯问题?

明细数据按源分区,避免全量数据回溯,可对全量数据做拆分
维度层面回溯维表,事实表关联维度,不回溯

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