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Answer Posted / subhajit guha
Data might come from different sources.ETL is a concpt of
datawarehousing.Dataware house holds the data marts which
is related to heterogenious data.
So before store the data in datawarehouse, ETL is used for
staging purpose of data.
The abreviation of ETL is Extraction,Trasform and Loading.
ETL tools perform extraction of data from different source,
hen it transform into usable data and load the ransformed
data into Datawarehouse.
there are so many etl tools are available in market....
1. DATA STAGE
2. Informatica
3. Abinstio
4. DATA integrator
5. WEbsphere
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