Convenience node that joins two tables. The join on the two tables is carried out such that the first table appears on the left side of the new table and the second one on the right side. Thus, the output table has as many rows as the input tables (if the IDs in both tables match) and as many columns as the sum of both column counts. The join is based on matching row keys. If a row key only occurs in one of the two tables, the remaining part is filled with missing cells.