What will the result be if you perform a join operation without any matching keys?

When performing a join operation on two tables in Qlik Sense or similar environments, the result of the operation depends on the type of join used. If there are no matching keys between the two tables and a regular (inner) join is performed, no rows will be returned because the join requires matching values to create new rows.

However, the answer indicating that rows with null values are created suggests that a left or outer join might be in context rather than strictly an inner join. In such cases, when using a left join, all rows from the first (left) table would be retained, and for those rows that do not find a match in the second (right) table, null values will populate the columns originating from the right table. This means that the final outcome retains all data from the left table while appending nulls for non-matching entries from the right table.

This understanding reflects how Qlik Sense manages data during joins, especially in scenarios where there aren't any matching keys. It clarifies the behavior and results based on the type of join applied in the data model.