Imagine rows and columns of information in 5 spreadsheets. Four of the spreadsheets are connected by way of key fields that match the biggest sheet referred to as the actual fact table. Imagine the fact table is 50 million records Mart News, which actually doesn’t fit in a spreadsheet, so they are saved in data mart tables. Most data marts have 5-10 tables in this star schema design, and the small tables on the star arms are known as dimension tables.
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