题解 | #统计每种性别的人数#
统计每种性别的人数
http://www.nowcoder.com/practice/f04189f92f8d4f6fa0f383d413af7cb8
SELECT case when profile like '%female' then 'female' when profile like '%male' then 'male' end gender, count(*) as number from user_submit group by gender
-- 先查%female，再 %male，结果正确，如果是先male 后 female，结果不对
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