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 IS NULL OR age < 25 THEN '25岁以下' ELSE '25岁及以上' END AS age_group, COUNT(*) AS user_count FROM user_profile GROUP BY age_group;