Weather Observation Station 4 query in SQL – Hacker Rank Solution

Weather Observation Station 4
Weather Observation Station 4 query in SQL – Hacker Rank Solution

Problem

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:

1449345840 5f0a551030 Station

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 , because .



Weather Observation Station 4 query in SQL – Hacker Rank Solution

select count(city) - count(distinct city) from station;

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