What race code is best to use in inquiries to search all records?

The best race code to use in inquiries to search all records is "U." This code stands for "Unknown" and is designed to ensure that all records are included in search results, regardless of the race category assigned at the time the record was entered. Using "U" allows for a comprehensive search, as it effectively captures individuals whose race has not been specified or may not fit into the conventional classifications.

The other codes are more specific and reference particular racial categories, limiting the search to only those cases matching the selected race. Therefore, using "U" is ideal for broader inquiries, ensuring that no relevant records are excluded from the results.