Final answer:
Data duplication is not a transformation type under data integration.
Step-by-step explanation:
Data transformation is one of the key processes in the field of data integration, where data from multiple sources are combined and transformed into a unified format.
There are several types of transformations used in data integration, including aggregate (performing calculations on grouped data), filter (selecting specific rows based on certain conditions), and join (combining data from multiple tables based on a common key). However, data duplication is not a transformation type under data integration, as it refers to the presence of duplicate records which can be resolved during the integration process.