Explain the for project management. Provide SQL examples of how to implement a Type 2 SCD.
: Methods to track history when attributes change (e.g., when a customer moves to a new city). Type 1 : Overwrite the old data. Type 2 : Create a new row to preserve history (most common). Type 3 : Add a "previous value" column. Kimball & Ross - The Data Warehouse Toolkit 2nd...
: Uses "Conformed Dimensions" (standardized lists like a master customer list) so different data marts can "talk" to each other. Explain the for project management