The YEAR function

The following query retrieves rows where the call_dtime is earlier than the beginning of the current year.
Figure 1: Query
SELECT customer_num, call_code, 
   YEAR (call_dtime) call_year,
   YEAR (res_dtime) res_year
   FROM cust_calls
   WHERE YEAR (call_dtime) < YEAR (TODAY);
Figure 2: Query result
customer_num call_code call_year res_year 

         116 I              1997     1997
         116 I              1997     1997