浅析ETL过程的四步 What are the four basic Data Flow steps of an ETL process? 在ETL过程中四个基本的过程分别是什么? 答: Kimball数据仓库构建方法中,ETL的过程和传统的实现方法有一些不同,主要分为四个阶段,分别是抽取(extract)、清洗(clean)、一致性处理(comform)和交付(delivery),简称为ECCD。 1.抽取...
【答案】：Kimball数据仓库构建方法中，ETL的过程和传统的实现方法有一些不同，主要分为四个阶段，分别是抽取（extract）、清洗（clean）、一致性处理（comform）和交付（delivery），简称为ECCD。1．抽取阶段的主要任务是：读取源系统的数据模型。连接并访问源系统的数据。变化数据捕获。抽取数据到数据准备区...
This In-depth Tutorial on ETL Process Explains Process Flow & Steps Involved in the ETL (Extraction, Transformation, and Load) Process in Data Warehouse: This tutorial in the series explains: What is ETL Process? Data Extraction, Transformation, Loading, Flat Files, What is Staging? ETL Cycle,...
What are the four basic Data Flow steps of anETLprocess?在ETL过程中四个基本的过程分别是什么?答:Kimball数据仓库构建方法中,ETL的过程和传统的实现方法有一些不同,主要分为四个阶段,分别是抽取(extract)、清洗(clean)、一致性处理(comform)和交付(delivery),简称为ECCD。1.抽取阶段的主要任务 ...
当将元数据导出到标记文件时,您可以启用选项 Do not export dependent steps from unselected process来排除相依赖的步骤。 除了数据依赖性,您还必须考虑级联(cascading)。可以考虑过程 P5 中的一个步骤,它包含到过程 P6 中某一个步骤的捷径。如果导出 P5,那么 P6 也会被导出。本例中,导出通过捷径级联向下转到下...
It includes following steps that are applied to transform data: Cleaning: Data Mapping of particular values by code (i.e. null value to 0, male to ‘m’, female to ‘f’) to ensure data quality. Deriving: Generate new values using available values (e.g. Total from price and quantity)...
ETL的主要步骤(The main steps of ETL) ETL的主要步骤(The main steps of ETL) The main steps of ETL The main steps of ETL ETL (Extract Transform Loading, data extraction conversion Loading rules) is the process of transforming data source data into data warehouse data. Is the most important ...
3 支持工作共享的分区并行处理SpringBatch提供了将数据拆分成多个分区，并分配给多个从属步骤（slave steps...
As soon as digital tasks - or entire processes - are to be executed repetitively and reliably, an automated solution is needed. In addition to the pure execution of work steps, other aspects are important: 一旦数字任务(或整个流程)要重复可靠地执行,就需要自动化解决方案。除了纯粹的工作步骤执行外...
4. What are the four basic Data Flow steps of an ETL process? 在ETL过程中四个基本的过程分别是什么? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37