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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:

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.

SOLUTION:-

SELECT COUNT(City) - COUNT(DISTINCT City)
FROM Station;

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