Kettle is a set of ETL tools that allow you to manage data from different databases by providing a graphical user environment that describes what you want to do, not how you want to do it.
There are two script files in Kettle, transformation and job. Transformation completes the basic transformation of data, and job completes the control of the entire workflow.
As an important part of Pentaho, it is gradually increasing in domestic project applications.
http://www.ukettle.org/
http://community.pentaho.com/projects/data-integration/
Pentaho is the world's most popular open source business intelligence software, with workflow as the core, emphasizing solution-oriented rather than tool components, a business intelligence (BI) suite BI based on the java platform, the reason why the suite is Because it includes a web server platform and several software tools: reports, analysis, charts, data integration, data mining, etc., it can be said to include all aspects of business intelligence. It integrates multiple open source projects and aims to rival commercial BI. It is biased towards BI solutions combined with business processes, focusing on medium and large enterprise applications. It allows business analysts or developers to create reports, dashboards, analytical models, business rules and BI processes.