Transformations are the most important aspect of the Informatica PowerCenter tool. The functionality of any ETL tool lies in transformations. Needless to say, transformations are used to transform data. Informatica PowerCenter provides multiple transformations, each serving a particular functionality. Transformations can be created as reusable or nonreusable based on the requirement. The transformations created in Workflow Manager are nonreusable, and those created in the task developer are reusable. You can create a mapping with a single transformation or with multiple transformations.

When you run the workflow, Integration Services extracts the data in a row-wise manner from the source path/connection you defined in the session task and makes it flow from the mapping. The data reaches the target through the transformations you defined.

The data always flows in a row-wise manner in Informatica no matter what your calculation or manipulation...