Final answer:
The keyword that can be used to assign the name to a new variable in Proc SQL is AS.
Step-by-step explanation:
The keyword that can be used to assign the name to a new variable in Proc SQL is AS. In Proc SQL, the AS keyword allows you to assign an alias or a new name to a variable within a query result. For example, you can use AS to assign a new name to a calculated column or to rename an existing column.