Which of the following statements can describe a left outer join?

A left outer join is defined by its ability to include all records from the left table, along with matched records from the right table. If there are no corresponding records in the right table for a particular record in the left table, the result will still include that unmatched row from the left table, but with null values in the columns from the right table where there is no match. This characteristic is fundamental to the left outer join, which is why the chosen statement accurately describes it.

The other statements do not align with the definition of a left outer join. For instance, stating that a left outer join requires at least one match to return results is misleading, as it will return all records from the left table regardless of whether there is a matching record in the right table. The assertion that it only retrieves data from the right table is also incorrect because a left outer join explicitly includes all data from the left table. Lastly, the notion that it cannot be used in combined queries is inaccurate, as left outer joins can indeed be part of complex SQL queries that involve combining multiple tables.