题解 | #分组计算练习题#
分组计算练习题
http://www.nowcoder.com/practice/009d8067d2df47fea429afe2e7b9de45
SELECT
gender,
university,
count(device_id),
avg(active_days_within_30),
avg(question_cnt)
from user_profile
group by university,gender
分组计算练习题
http://www.nowcoder.com/practice/009d8067d2df47fea429afe2e7b9de45
SELECT
gender,
university,
count(device_id),
avg(active_days_within_30),
avg(question_cnt)
from user_profile
group by university,gender
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