Integration Services uses transformations to manipulate data during an ETL dataflow. Transformations can be used in [[articles:SSIS Dataflow
Task|Data Flow Tasks]], between data source and destination components, or other transformations.
There are many cases (for example, in reporting), when some elements of a dataset has to be transposed. The Pivot transformation can help in this during the load process of a data warehouse.
For example, if the source dataset looks like this (three columns):
So, the Pivot transformation can be used as an opposite transformation of the Unpivot transformation, which is helpful when a more normalized result set is needed.
For more detailed information on this transformation, please refer to this MSDN article.
For the complete list of SSIS transformations, check this Wiki article.
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