题解 | #分组过滤练习题#
查看不同年龄段的用户明细
http://www.nowcoder.com/practice/ae44b2b78525417b8b2fc2075b557592
SELECT
device_id,gender
,CASE when age<20 THEN '20岁以下'
when age between 20 and 24 THEN '20-24岁'
when age>24 THEN '25岁及以上'
else '其他'
END as age_cut
device_id,gender
,CASE when age<20 THEN '20岁以下'
when age between 20 and 24 THEN '20-24岁'
when age>24 THEN '25岁及以上'
else '其他'
END as age_cut
FROM user_profile
注意逗号。
