Slowly Changing Dimensions (SCD) Explained: Types 1, 2, and 3
Slowly changing dimensions explained: SCD Type 1, 2, and 3 with a SQL MERGE example, surrogate keys, effective dates, and current flags for accurate history.
WRITING / NOTES FROM THE FORGE
Data Modeling
2 articles tagged Data Modeling.
Star Schema vs Snowflake Schema: Data Modeling for Analytics
Star schema vs snowflake schema explained with facts, dimensions, grain, SQL examples, and clear guidance on which data model fits your analytics warehouse.