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
SELECT
SUBSTRING_INDEX (profile, ',', -1) AS gender,
COUNT(*) AS number
FROM
user_submit
GROUP BY
gender;
SELECT
IF (profile LIKE '%female', 'female', 'male') AS gender,
COUNT(*) AS number
FROM
user_submit
GROUP BY
gender;
SELECT
CASE
WHEN profile LIKE '%male' THEN 'male'
WHEN profile LIKE '%female' THEN 'female'
END AS gender,
COUNT(*) AS number
FROM
user_submit
GROUP BY
gender;
