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This seems to select the alphabetically last city for max length. The test does not catch this as it has only one city with max length. I modified this to:
select city, length(city) city_length from (select city, length(city) city_length from station order by city_length, city) where rownum = 1 union select city, length(city) city_length from (select city, length(city) city_length from station order by city_length desc, city) where rownum = 1;
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Weather Observation Station 5
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This seems to select the alphabetically last city for max length. The test does not catch this as it has only one city with max length. I modified this to:
select city, length(city) city_length from (select city, length(city) city_length from station order by city_length, city) where rownum = 1 union select city, length(city) city_length from (select city, length(city) city_length from station order by city_length desc, city) where rownum = 1;