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？

[试题]E．xplain the three basic delivery steps for conformed dimensions.简述对一致性维度的三种基本的交付步骤。

[试题]What steps do you take to determine the bottleneck of a slow running ETL process?如果ETL进程运行较慢，需要分哪几步去找到ETL系统的瓶颈问题。

[试题]What are the characteristics of the four levels of the ETL support model?简述ETL技术支持工作的四个级别的特点。

[单选题]In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.A . two crankshaft revolutions in a two-stroke/cycle engineB . two power strokes in a two-stroke/cycle engineC . one power stroke in a two-stro

[试题]What are the four broad categories of data quality checks? Provide an implementationtechnique for each.数据质量检查的四大类是什么？为每类提供一种实现技术。

[试题]What is a logical data mapping and what does it mean to the ETL team?什么是逻辑数据映射？它对ETL项目组的作用是什么？

[单选题]The basic concept of a data ( )is the difference between data and informati

[单选题]The basic concept of a data(72)is the difference between data and information.A．warehouseB．storageC．baseD．service

[单选题]What’s the overall goal of English teaching in basic education stage?A.Incr

[试题]What are the permissible data structures for the data staging area? Briefly describe the pros and cons of each.在数据准备区中允许使用的数据结构有哪些？各有什么优缺点？