Building the DW - ETL

Extraction, Transformation and Loading Process Data Warehousing Technologies Dr. Ilieva I. Ageenko

Extraction, Transformation and Loading ,[object Object],[object Object],[object Object],[object Object]

ETL and Metadata ,[object Object],[object Object],[object Object]

Role of Metadata ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Role of Metadata ,[object Object],[object Object],[object Object],[object Object]

Mistakes to Avoid ,[object Object],[object Object]

ETL- Tools for Data Extraction, Transformation and Load ,[object Object],[object Object],[object Object],[object Object]

Generation of ETL Tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Strengths and Limitations of First Generation ETL tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Strengths and Limitations of Second Generation ETL tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ELT process ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Steps of Daily Production Extract ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Extraction Phase - Snapshots ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Loading Phase ,[object Object],[object Object],DBMS Data + aggregations Data + aggregations Mirror 1 Mirror 2 What are the benefits of using a mirrored DW?

Mirrored Data Warehouse ,[object Object],[object Object],[object Object]

Data Quality Assurance ,[object Object],[object Object],DBMS DBMS Mirror 1 Mirror 2 Mirror 1 Mirror 2 ETL ETL QA QA fails

Advantages Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Loading, Indexing and Exception Processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Conforming Dimensions ,[object Object],[object Object],[object Object],[object Object]

Building the DW - ETL

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Building the DW - ETL