Which tool allows for a "Left Outer Join" operation on datasets in Alteryx?

The Join Tool in Alteryx is designed specifically for joining two datasets based on a common field or fields, and it can perform different types of joins, including "Left Outer Join." When you use the Join Tool, it allows you to specify how you want the data to be combined, providing options for inner joins, left outer joins, right outer joins, and outer joins.

A "Left Outer Join" operation means that all records from the left dataset are retained, along with matched records from the right dataset. When a match does not exist in the right dataset, the output will have null values for the fields coming from that right dataset. This functionality is integral for analysts who need to maintain all records from the primary dataset while selectively pulling in data from a secondary dataset.

The other tools mentioned do not serve this specific function. The Union Tool is used for appending multiple datasets together vertically, while the Join Multiple Tool is utilized for combining multiple datasets but operates differently than the standard Join Tool. The Join Input Tool is not a standard tool and does not exist in Alteryx for performing join operations. Therefore, the Join Tool is the correct choice for executing a "Left Outer Join" operation.