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- OLTP VS OLAP - Difference between OLTP and OLAP
Tables in DWH
Dimensions:
- Dimensions are attributes about facts.
- They store textual description about business.
- Dimensions are denormalized due to one to many relationships
Ex: Store, Product, Employee, Customers
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Facts:
Facts are the actual transactions or values being analyzed
- They contain composite primary key where each attribute of a primary key is a foreign key to the dimension tables
- A fact table contains the facts at the lowest level granularity
FACT:
- Prod Id, Cust Id, Sales Date are Dimension Keys.
- Quantity Sold, Amount Sold is Fact Measures/KPI’s
- KPI stands for Key Performance Indicators
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Last updated: 03 Apr 2023
About Author
Ravindra Savaram is a Technical Lead at Mindmajix.com. His passion lies in writing articles on the most popular IT platforms including Machine learning, DevOps, Data Science, Artificial Intelligence, RPA, Deep Learning, and so on. You can stay up to date on all these technologies by following him on LinkedIn and Twitter.
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