Employee Number is the business key and it is an important attribute for ETL because ETL distinguishes new employees or existing employees based on this field. Read more
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So, the user will require an understanding of why the sale is higher on a specific date rather than on other days. The data warehouse is the core of the BI system. Read more
You may think that you would create another dimension and enter the transaction number there and assign a surrogate key and use that surrogate key in the Fact table. Grain is one of the most important terminologies used to design a data warehouse. So, instead of creating a dimension with the same Grain as the fact and with only one column, we would leave Cheapest Audition 2 column even if it is a string inside the Fact table. We've explained that Fact tables usually contain FKs of dimensions and some measures. This kind of information helps you to provide enough products to cover demand, and you may even think about creating another branch in some regions. In our example, there is only one business process, that is, sales. Then, only a key to that table would be pointed from the customer table. But the important note is that our goal in dimensional modeling is not normalization. Learn how to pin a report item to Power BI dashboard. Read the blog. Usually, the date and time dimensions are generic and static, so you won't be required to populate these dimensions through ETL every night; you just load them once and then you could use them.
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MS SQL Server 2014 Business Intelligence - Zinovate Academy
