10.why we are going to data warehouse?
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Answer Posted / vams_gk
for reporting one day details also enough.but analysis
means we need comparision means we need some old data is
called historical data.the data ware house saves historical
data ,we con't to any data base manuplations.
where is in normal databases we arte able to maintain some
extent of data .after that for entering new data u need to
delete the old data.
BUT in Data ware house u are able to stote years of records
no need to delete the old data
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