Final answer:
Field aliases cannot be applied to lookups.
Step-by-step explanation:
Field aliases cannot be applied to lookups. When working with databases, a lookup is a reference to another table that allows you to retrieve additional information. Field aliases, on the other hand, are used to give a different name to a field in the query result. Since lookups are based on the actual field names in the referenced table, it is not possible to apply aliases to them.