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Weather Observation Station 4
Weather Observation Station 4
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select count(city)- count(distinct city) from station
select count(city) - count(distinct city) as D from station ;
SELECT COUNT(*) - COUNT(DISTINCT city) AS difference FROM station;
SELECT COUNT(CITY) - COUNT(DISTINCT CITY) AS difference FROM station
SELECT COUNT(CITY) - COUNT(DISTINCT CITY) AS difference FROM station;