Slowly Changing Dimension (SCD) : Type 1 in SQL Server | Data Engineer #sql #sql #dataengineers

What is a Slowly Changing Dimension Type 1?
Here in this video, you will be learning about :
You simply overwrite data in dimensions in the Type 1 SCD. In some cases, you may not have all of the data when the record is launched in the dimension. For example, you may not receive all columns when the customer record is initiated. As a result, when the customer record is begun at the operational database, it will contain empty or null records. Those empty records will be produced in the data warehouse once the ETL is completed. Once these columns are populated in the operational databases, the data warehouse must be updated.

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All SCD Types :
Type 0 - Ignore any changes and audit the changes.
Type 1 - Overwrite the changes
Type 2 - History will be added as a new row.
Type 3 - History will be added as a new column.
Type 4 - A new dimension will be added
Type 6 - Combination of Type 2 and Type 3

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Fan of how you teach, best method of SCD1 implementation using SQL