Techy Savvy

Data Engineer|SQL| ETL |databases| python| database design | data warehouse |data analytics|database modelling |C++| OOP| data structures #connect

[Techy Savvy @techie_195]

Conclusion
In summary, the choice between Star Schema and Snowflake Schema depends on your data’s complexity, storage needs, and query performance goals. Mastering both helps you design better data models for any situation. #DataWarehousing

[Techy Savvy @techie_195]

Ever heard of Star Schema and Snowflake Schema in data modeling? 🧐
These are the two most popular ways to structure data in data warehouses. Let’s dive into their differences, advantages, and when to use each! 🧵 #StarSchema #SnowflakeSchema #DataWarehousing

[Techy Savvy @techie_195]

✓Complexity:
Harder to design, understand, and maintain compared to Star Schema.
✓BI Tool Compatibility: Some BI tools perform better with flat, denormalized schemas.

[Techy Savvy @techie_195]

Conclusion
In summary, fact and dimension tables are foundational to organizing data in a warehouse.
By mastering them, you can design efficient data models that support insightful analysis. Thanks for reading! #DataWarehousing #FactAndDimensionTables #DataModeling

[Techy Savvy @techie_195]

Slowly Changing Dimensions (SCD) in datawarehouse

In data warehousing, dimension data often changes over time. Managing these changes requires Slowly Changing Dimensions (SCDs).
Here’s how they work. 🔄 #SCD #DataModeling

✓Type 1:
Overwrite old data (no history tracking).

[Techy Savvy @techie_195]

•Healthcare:
✓Fact Table: Patient_Visit_Fact (visit cost, duration).
✓Dimension Tables: Date, Patient, Doctor, Department.

•Finance:
✓Fact Table: Transaction_Fact (transaction amount, fees).
✓Dimension Tables: Date, Account, Branch, Customer.