SQL19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;
#聚合函数作为筛选条件不能用WHERE,该用HAVING
#SQL练习#SQL专项练习 文章被收录于专栏
SQL语句
