题解 | #分组过滤练习题#
分组过滤练习题
https://www.nowcoder.com/practice/ddbcedcd9600403296038ee44a172f2d
SELECT
university,
AVG(question_cnt) AS avg_question_cnt,
AVG(answer_cnt) AS avg_answer_cnt
FROM user_profile
GROUP BY university
HAVING avg_question_cnt< 5 OR avg_answer_cnt < 20;
注意区分where和having的区别
投递拼多多集团-PDD等公司10个岗位