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
CASE
WHEN age< 25 or age is null THEN '25岁以下'
ELSE '25岁及以上'
END AS age_cut,
COUNT(*) AS number
FROM user_profile
GROUP BY age_cut;
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