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I beleive your first select query is to select larger city, In the first select query you are applying descending only to the city but not to the length.
you should go as below
order by len(city) desc, city desc
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I beleive your first select query is to select larger city, In the first select query you are applying descending only to the city but not to the length. you should go as below order by len(city) desc, city desc