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The biggest difference between a data mart and a data warehouse https://www.mighty.digital/blog/data-warehouse-vs-data-mart-know-the-difference is the amount of information they hold. A data mart holds smaller amounts of data than a data warehouse, while a data warehouse stores much larger datasets. Data marts also store a specific subject area. Knowing the difference between a data mart and a data warehouse can help you choose which is right for your company.
Thank you for the invitation, but I know too little about this field
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 area- for example, Finance, or Sales
May hold more summarised data (although many hold full detail)
Concentrates on integrating information from a given subject area or set of source systems
Is built focused on a dimensional model using a star schema
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