๐ ๐๐ฆ๐ฉ๐ฅ๐๐ฆ๐๐ง๐ญ๐ข๐ง๐ ๐๐ฅ๐จ๐ฐ๐ฅ๐ฒ ๐๐ก๐๐ง๐ ๐ข๐ง๐ ๐๐ข๐ฆ๐๐ง๐ฌ๐ข๐จ๐ง ๐๐ฒ๐ฉ๐ ๐ ๐ข๐ง ๐ ๐๐๐ซ๐ข๐ ๐๐๐ญ๐ ๐๐๐ซ๐๐ก๐จ๐ฎ๐ฌ๐ข๐ง๐ ๐ฐ๐ข๐ญ๐ก ๐๐๐ญ๐๐๐ฅ๐จ๐ฐ ๐๐๐ง๐
Slowly Changing Dimension (SCD) Type 2 is crucial in data warehousing for tracking and managing historical changes in dimension tables. It retains old records and creates new ones when attributes change, providing a detailed historical view.
Explore ๐ this tutorial ย which dives into ๐ข๐ฆ๐ฉ๐ฅ๐๐ฆ๐๐ง๐ญ๐ข๐ง๐ ๐๐๐ ๐๐ฒ๐ฉ๐ ๐ ๐ฎ๐ฌ๐ข๐ง๐ ๐๐๐ญ๐๐๐ฅ๐จ๐ฐ ๐๐๐ง๐.
The solution involves key components such as:
โ
๐๐จ๐ฎ๐ซ๐๐ ๐๐๐๐ฅ๐ย containing new data to load.
โ
๐๐ข๐ฆ๐๐ง๐ฌ๐ข๐จ๐ง ๐๐๐๐ฅ๐ย which stores historical data in the data warehouse.
โ
๐๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐๐จ๐ ๐ข๐ ๐ญ๐จ ๐ข๐๐๐ง๐ญ๐ข๐๐ฒ ๐๐ก๐๐ง๐ ๐๐ฌ by comparing the Source and Dimension tables.
โ
๐๐ฉ๐๐๐ญ๐ ๐๐จ๐ ๐ข๐ to add and update records in the Dimension table.
It demonstrates how to use ๐ก๐๐ฌ๐ก๐ข๐ง๐ ๐ญ๐๐๐ก๐ง๐ข๐ช๐ฎ๐๐ฌ and ๐ฆ๐๐ซ๐ ๐ ๐จ๐ฉ๐๐ซ๐๐ญ๐ข๐จ๐ง๐ฌ for efficient ๐๐ก๐๐ง๐ ๐ ๐๐๐ญ๐๐๐ญ๐ข๐จ๐ง and ๐ฎ๐ฉ๐ฌ๐๐ซ๐ญ๐ฌ.
๐For an alternative method, check out my previous post on : implementing SCD Type 2 using T-SQL:
Implementing SCD Type 2 in Microsoft Fabric Data Warehouse with T-SQL Stored Procedure
Slowly Changing Dimension (SCD) describes situations in data warehousing where the attributes of a dimension member change over time, requiring a strategy to manage and record these modifications effectively.
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