ETL (Extract, transform, load) Question:
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Explain and Compare ETL & Manual development?
Answer:
ETL - The process of extracting data from multiple sources.(ex. flat files,XML, COBOL, SAP etc) is more simpler with the help of tools.
Manual - Loading the data other than flat files and oracle table need more effort.
ETL - High and clear visibilty of logic.
Manual - complex and not so user friendly visibilty of logic.
ETL - Contains Meta data and changes can be done easily.
Manual - No Meta data concept and changes needs more effort.
ETL- Error hadling,log summary and load progess makes life easier for developer and maintainer.
Manual - need maximum effort from maintainance point of view.
ETL - Can handle Historic data very well.
Manual - as data grows the processing time degrads.
These are some differences b/w manual and ETL developement.
Manual - Loading the data other than flat files and oracle table need more effort.
ETL - High and clear visibilty of logic.
Manual - complex and not so user friendly visibilty of logic.
ETL - Contains Meta data and changes can be done easily.
Manual - No Meta data concept and changes needs more effort.
ETL- Error hadling,log summary and load progess makes life easier for developer and maintainer.
Manual - need maximum effort from maintainance point of view.
ETL - Can handle Historic data very well.
Manual - as data grows the processing time degrads.
These are some differences b/w manual and ETL developement.
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