Which tool is used in Alteryx to join multiple data sources?

The Join Tool is specifically designed for combining two data sources based on a common field or set of fields. It allows users to match records from both sources, effectively merging the datasets while retaining only relevant columns from each source. The functionality of the Join Tool is essential for tasks that require integrating information from different datasets that have a shared key, such as joining sales data with customer information.

While the other options also relate to data integration, they serve different purposes. The Union Tool appends multiple datasets together vertically, ensuring that they have the same structure. The Merge Tool is not a standard term used in Alteryx. The Data Connect Tool, on the other hand, does not specifically focus on joining data but is used to connect to various types of data sources for input purposes. Hence, the Join Tool is the most appropriate choice for joining multiple data sources based on key fields.