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ID AGE
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2 19
3 19
4 21
5 22
6 27
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3 where 2=(select count(*) from t1 t22 where t11.age>t22.age);
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2 from
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4 select id,age,
5 dense_rank() over(order by age) dr
6 from t1
7 )
8 where dr=3;
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5 rank() over(order by age) dr
6 from t1
7 )
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