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
# 知识点：模糊查询
*一般我们能想到的是字符串截取函数substring_index(),而模糊查询不失为另一种解题思路；
SELECT
IF(profile LIKE '%female','female','male') as gender,
COUNT(1) as number
FROM user_submit
GROUP BY IF(profile LIKE '%female','female','male');
IF(profile LIKE '%female','female','male') as gender,
COUNT(1) as number
FROM user_submit
GROUP BY IF(profile LIKE '%female','female','male');
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