explain about dirty dimension?
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What are the difference between snow flake and star schema?
Explain difference between e-r modeling and dimentional modeling?
What is a data warehousing?
Suppose if a session fails after loading of 10,000 records in to the target.how can you load the records from 10001 the record when you run the session next time?
Define data warehouse?
how much memory space occupied real time project (roughly)?
What is surrogate key? Where we use it? Explain with examples.
What is cubes?
How to handle time period attribute for time dependent data?? a.)add time period as a part of pk b.)add time period simply and make it nullablec.)add time period simply and make it not null.
What is ods (operation data source)?
What is perform recovery?
How can we do data cleaning?