Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. The STATION table is described as follows: Field ID CITY STATE LAT_N LONG_W STATION Type NUMBER VARCHAR2 (21) VARCHAR2 (2) NUMBER NUMBER where LAT_N is the northern latitude and LONG_W is the western longitude. For example, if there are three records in the table with CITY values 'New York', 'New York', 'Bengalaru', there are 2 different city names: 'New York' and 'Bengalaru'. The query returns 1. because total number of records - number of unique city names = 3 - 2 = 1.