Which function is used specifically to remove trailing spaces?

The RTrim function is specifically designed to remove trailing spaces from a string. When applied, it scans the end of the string and eliminates any spaces that follow non-space characters. This is particularly useful in data preparation and cleansing processes, where trailing spaces can lead to inconsistencies and errors in analyses, joins, or when loading data.

In contrast, the Trim function removes spaces from both ends of a string, which means it is more general-purpose for whitespace but does not exclusively target trailing spaces. LTrim focuses solely on removing leading spaces from the beginning of a string, while AutoNumber is unrelated, as it serves to convert text values into numeric representations for the purposes of efficient storage and processing. The specificity of RTrim for tailing spaces makes it the appropriate choice in this context.