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Agree except one can ask clarifying questions from a real life client. Trying "SELECT MIN(CITY),LENGTH(CITY) FROM STATION GROUP BY LENGTH(CITY) ORDER BY LENGTH(CITY);" is simplistic but under certain assumptions could also be correct. In other words, logically the question can be proved ambiguous and there is no recourse for clarifying questions.
Weather Observation Station 5
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Agree except one can ask clarifying questions from a real life client. Trying "SELECT MIN(CITY),LENGTH(CITY) FROM STATION GROUP BY LENGTH(CITY) ORDER BY LENGTH(CITY);" is simplistic but under certain assumptions could also be correct. In other words, logically the question can be proved ambiguous and there is no recourse for clarifying questions.