Kimball vs Inmon - The History of Data Warehousing

Bill Inmon and Ralph Kimball are two important historical figures in data warehouse modeling. Bill Inmon advocated for a "top-down" approach, which involves starting with an enterprise data warehouse. Ralph Kimball pioneered a "bottom-up" approach, which involves starting with business unit-focused data marts.

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So whats the difference between Inmon model vs traditional ER model in database?