题解 | #统计每种性别的人数#
统计每种性别的人数
https://www.nowcoder.com/practice/f04189f92f8d4f6fa0f383d413af7cb8
#按性别分组group by gender #本题主要是字符串截取，substring_index(字段名，'分隔符'，前几个) select gender,count(*) from( select substring_index(profile,',',-1) as gender from user_submit )t group by gender
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