Algorithm
Problem Name: Sql -
In this HackerRank Functions in SQL problem solution,
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 recourds - number of unique city name 3 -2 = 1
Code Examples
#1 Code Example with SQL
Code -
SQL
SELECT
COUNT(CITY) - COUNT(DISTINCT CITY)
FROM
STATION;