Give me a broad concept of what a data warehouse is, and
what it might be used for?
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Answer / phani kumar
Any organization keeps track of data and the current data
is only relevant to the OLTP means Online transaction
processing.
Suppose a company maintains sales data of different areas
for a particular product and it wants to know, whether a
particular area is having good sales or not.
For this it has to work on the past data for the sales made
at a particular area.
For making strategic decisions at a higher management level,
analysis needs to be made not on the historical data, which
is being maintained in the datawarehouse.
| Is This Answer Correct ? | 3 Yes | 1 No |
it maintains pre historical data
suposse ajay gone to usa yesterday,today he is in india in
normal data base like oracle current information only
availabble such as ajay is in india,but in dataware
house ''ajay gone to usa yesterday,today he is in india''
| Is This Answer Correct ? | 0 Yes | 3 No |
Suppose you are filtering the rows using a filter transformation only the rows meet the condition pass to the target. Tell me where the rows will go that does not meetthe condition.
What is scd1 , scd2 , scd3?
Tell me what is degree of a relation?
capital of tamilnadu
Fact table is in normalized or de-normalized form?
What is mean by aggregate aware?
What are fact, dimension, and measure?
Explain what is the limit to the number of sources and targets you can have in a mapping?
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How to improve session performance in aggregator transformation?
Explain what are the different types of join operations?
If I have table T1 and table T2 T1 has 250 cols and 10,000 rows T2 has 2 billion rows and 10 cols Which one would be Fact table and which one would be Dimension table and why ?
3 Answers Extech, Principal Finance,