Learning Pentaho Data Integration 8 CE(Third Edition)
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Integrating data

Imagine two similar companies that need to merge their databases in order to have a unified view of the data, or a single company that has to combine information from a main Enterprise Resource Planning (ERP) application and a Customer Relationship Management (CRM) application, though they're not connected. These are just two of hundreds of examples where data integration is needed. The integration is not just a matter of gathering and mixing data; some conversions, validation, and transfer of data have to be done. PDI is meant to do all these tasks.