what is meant by roll up and roll back in dataware housing????
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Answer Posted / thanjairajan@gmail.com
Roll Up: A method used to summarize measure values up the category tree structure.
Roll Back: I think this method is available only in oracle. roll back retrieve all records after delete the records from table.
for example if the emp table contain 100 records. delete these 100 records using delete command like *delete from emp* we can also retrieve all these 100 records using roll back method.
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