Final answer:
It is true that after creating a field alias in SPL, it can be used as a normal field within the search language, helping to make queries more readable and maintainable.
Step-by-step explanation:
The statement is true: after a field alias has been made in Search Processing Language (SPL), the alias can be used as if it were an ordinary field. In SPL, which is a language used for searching, filtering, and reporting on data, particularly within software like Splunk, an alias is created to provide a more readable or relevant name for a field. Once an alias is defined, you can use it throughout your SPL query just like any other field. This feature is particularly useful for making SPL queries more readable and easier to understand, especially when dealing with fields that have obscure or misleading names.
By using an alias, you can streamline complex queries and ensure that your search statements are cleaner and more intuitive. Furthermore, when data structure changes require modifications to field names, only the alias definitions would need to be updated instead of changing every instance where that field is used in searches and reports.