题解 | #计算25岁以上和以下的用户数量#
计算25岁以上和以下的用户数量
https://www.nowcoder.com/practice/30f9f470390a4a8a8dd3b8e1f8c7a9fa
select if (age < 25 or age is null, '25岁以下','25岁及以上') as age_cut, count(device_id) number from user_profile group by age_cut
计算25岁以上和以下的用户数量
https://www.nowcoder.com/practice/30f9f470390a4a8a8dd3b8e1f8c7a9fa
select if (age < 25 or age is null, '25岁以下','25岁及以上') as age_cut, count(device_id) number from user_profile group by age_cut
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