What does an update transformation accomplish?

An update transformation is specifically designed to change specified field values in a dataset based on criteria or information from another dataset. This process involves identifying records that need to be modified and applying the necessary changes, which can enhance data accuracy and relevance. For instance, if there's a field in a customer database that needs to be updated with new address information sourced from a separate list, the update transformation would facilitate that change.

The focus of this transformation is on the dynamic updating of existing records rather than combining datasets, removing duplicates, or summarizing information. Each of these alternative functionalities pertains to different types of data manipulation processes, but they do not specifically capture the essence of what an update transformation does.