ETL (Data Extraction, Transformation and Loading) is mainly used for integrating all kinds of heterogeneous muti-data sources. ETL is the footstones of data warehouse, data mining and business intelligence.

• 数据ETL(Data Extraction,Transformation and Loading)主要用来实现异构多数据源的数据集成,是数据仓库、数据挖掘以及商业智能等技术的基石,具有数据抽取、数据转换和数据装载功能。