Which method allows a data officer to retrieve information about an incident associated with a survey?

The method that allows a data officer to retrieve information about an incident associated with a survey is to use a Left Join within the context of database querying. A Left Join retrieves all records from the left table (in this case, the survey) and the matched records from the right table (the incidents). If there is no match, the result will still include all records from the left table, but with NULL values for the right table's columns.

This is particularly useful in scenarios where you want all survey data to be included regardless of whether there are related incident entries. By using a Left Join, the data officer can ensure that every survey is represented in the output, along with any associated incident information that may or may not exist. This method provides a comprehensive view of surveys while still attempting to link them with incident data.

Other methods like Inner Join would only return records that have a match in both tables, potentially omitting valuable survey information when no corresponding incidents exist. Right Join would focus on records from the right table first, which is less relevant in this case since the primary interest lies in the surveys. Full Join includes all records from both tables, which may lead to a more complex output that includes a lot of NULL value fields and is not necessary