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SQL VQ14 统计每天刷题数超过5的user_id以及刷题数

article 2024/11/20 15:15:41

SQL VQ14 统计每天刷题数超过5的user_id以及刷题数

数据
需求
解决

题目 : https://www.nowcoder.com/practice/852a14b888c448f1a26f0e2e20f668a7?tpId=341

数据

drop table if exists questions_pass_record_detail;

CREATE TABLE `questions_pass_record_detail` (
`user_id` int NOT NULL,
`question_type` varchar(32) NOT NULL,
`device` varchar(14) NOT NULL,
`pass_count` int NOT NULL,
`date` date NOT NULL
);

INSERT INTO questions_pass_record_detail VALUES(101, 'java', 'app', 2, '2020-03-01');
INSERT INTO questions_pass_record_detail VALUES(102, 'sql', 'pc', 15,'2021-07-07');
INSERT INTO questions_pass_record_detail VALUES(102, 'python', 'pc', 9, '2021-04-09');
INSERT INTO questions_pass_record_detail VALUES(104, 'python', 'app', 3,'2022-03-17');
INSERT INTO questions_pass_record_detail VALUES(105, 'sql', 'pc', 60, '2016-08-15');
INSERT INTO questions_pass_record_detail VALUES(204, 'sql', 'pc', 20, '2019-05-15');

需求

统计每天刷题数超过 5 的 user_id , 刷题数

查询结果 :

date|user_id|total_pass_count
2021-07-07|102|15
2021-04-09|102|9

解决

注意点 :

查询顺序 : from -> where -> group (含聚合) -> having -> order -> select

select `date`,
    user_id,
    sum(pass_count) as total_pass_count
from questions_pass_record_detail
group by `date`, user_id
having total_pass_count > 5;