Slowly Changing Dimensions (SCD) are techniques used in data warehousing to manage changes in dimension data over time while maintaining historical accuracy. There are three main types:
SCD Type 1 (Simple Overwrite): Updates the data by replacing the old value without retaining any history.
SCD Type 2 (Full History): Maintains a complete history by adding new rows for each change, with start and end dates.
SCD Type 3 (Limited History): Stores only the most recent change, keeping the previous value in a separate column.
These methods help ensure that historical data is managed according to business requirements for analysis and reporting.
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Slowly Changing Dimensions (SCD) are techniques used in data warehousing to manage changes in dimension data over time while maintaining historical accuracy. There are three main types:
These methods help ensure that historical data is managed according to business requirements for analysis and reporting.
Any reference explaining that concept https://learn.microsoft.com/en-us/fabric/data-warehouse/dimensional-modeling-dimension-tables#manage-historical-change https://learn.microsoft.com/en-us/fabric/data-factory/slowly-changing-dimension-type-one https://learn.microsoft.com/en-us/fabric/data-factory/slowly-changing-dimension-type-two
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