Tag archive for ‘Bill Inmon’
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A Cost comparision between Data Marts and a Data Warehouse
I've noticed a fair bit of search traffic focusing on cost questions, particularly which is cheaper; a series of data marts or a single enterprise data warehouse. I think it's a bit like the question of lease vs buy. Starting off building a single departmental data mart will represent a much smaller cash flow out. [...]
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Data Warehouse vs Data Mart
Very often, the question is asked- what's the difference between a data mart and a data warehouse- which of them do I need?
Data warehouse or Data Mart?Data Warehouse:
Holds multiple subject areas
Holds very detailed information
Works to integrate all data sources
Does not necessarily use a dimensional model but feeds dimensional models.Data Mart
Often holds only one subject [...]
