What is granularity? Please explain with example
Answer / lakshmi
Granularity defines the extent of details
Example:Let us look at geographical level of granularity.We may analyze data at the levels of country,region,territory,city and street.In this case,highest level of granularity is street.
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we have 1 source table containing 100 records. now we have to transfer first set of 1-10 (i.e1-10) records to one target table and another set of 1-10(11-20) records to other target table and continue like that till 100th record
Can there be sub steps of etl steps?
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1.Identify and discuss the problems which are occurred during data quality verification for the single-source and multi-source problems. 2.Testing has very important role in DWH. In ETL testing phase, how can we perform the integration testing and regression testing? 3.What are the perquisites of system testing and regression testing in ETL phase?
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