wordpress建淘宝客网站教程,环球购物官方网站,做外贸一般做什么,做网站教学视频每个67级用户活跃情况_牛客题霸_牛客网
0 问题描述 基于用户信息表user_info、、试卷作答记录表exam_record、题目练习记录表practice_record#xff0c;统计 每个6/7级用户总活跃月份数、2021年活跃天数、2021年试卷作答活跃天数、2021年答题活跃天数#xff0c;结果 按照总…每个67级用户活跃情况_牛客题霸_牛客网
0 问题描述 基于用户信息表user_info、、试卷作答记录表exam_record、题目练习记录表practice_record统计 每个6/7级用户总活跃月份数、2021年活跃天数、2021年试卷作答活跃天数、2021年答题活跃天数结果 按照总活跃月份数、2021年活跃天数降序排序。
1 数据准备
drop table if exists examination_info,user_info,exam_record,practice_record;
CREATE TABLE examination_info (id int PRIMARY KEY AUTO_INCREMENT COMMENT 自增ID,exam_id int UNIQUE NOT NULL COMMENT 试卷ID,tag varchar(32) COMMENT 类别标签,difficulty varchar(8) COMMENT 难度,duration int NOT NULL COMMENT 时长,release_time datetime COMMENT 发布时间
)CHARACTER SET utf8 COLLATE utf8_general_ci;CREATE TABLE user_info (id int PRIMARY KEY AUTO_INCREMENT COMMENT 自增ID,uid int UNIQUE NOT NULL COMMENT 用户ID,nick_name varchar(64) COMMENT 昵称,achievement int COMMENT 成就值,level int COMMENT 用户等级,job varchar(32) COMMENT 职业方向,register_time datetime COMMENT 注册时间
)CHARACTER SET utf8 COLLATE utf8_general_ci;CREATE TABLE practice_record (id int PRIMARY KEY AUTO_INCREMENT COMMENT 自增ID,uid int NOT NULL COMMENT 用户ID,question_id int NOT NULL COMMENT 题目ID,submit_time datetime COMMENT 提交时间,score tinyint COMMENT 得分
)CHARACTER SET utf8 COLLATE utf8_general_ci;CREATE TABLE exam_record (id int PRIMARY KEY AUTO_INCREMENT COMMENT 自增ID,uid int NOT NULL COMMENT 用户ID,exam_id int NOT NULL COMMENT 试卷ID,start_time datetime NOT NULL COMMENT 开始时间,submit_time datetime COMMENT 提交时间,score tinyint COMMENT 得分
)CHARACTER SET utf8 COLLATE utf8_general_ci;INSERT INTO user_info(uid,nick_name,achievement,level,job,register_time) VALUES(1001, 牛客1号, 3100, 7, 算法, 2020-01-01 10:00:00),(1002, 牛客2号, 2300, 7, 算法, 2020-01-01 10:00:00),(1003, 牛客3号, 2500, 7, 算法, 2020-01-01 10:00:00),(1004, 牛客4号, 1200, 5, 算法, 2020-01-01 10:00:00),(1005, 牛客5号, 1600, 6, C, 2020-01-01 10:00:00),(1006, 牛客6号, 2000, 6, C, 2020-01-01 10:00:00);INSERT INTO examination_info(exam_id,tag,difficulty,duration,release_time) VALUES(9001, SQL, hard, 60, 2021-09-01 06:00:00),(9002, C, hard, 60, 2021-09-01 06:00:00),(9003, 算法, medium, 80, 2021-09-01 10:00:00);INSERT INTO practice_record(uid,question_id,submit_time,score) VALUES
(1001, 8001, 2021-08-02 11:41:01, 60),
(1002, 8001, 2021-09-02 19:30:01, 50),
(1002, 8001, 2021-09-02 19:20:01, 70),
(1002, 8002, 2021-09-02 19:38:01, 70),
(1004, 8001, 2021-08-02 19:38:01, 70),
(1004, 8002, 2021-08-02 19:48:01, 90),
(1001, 8002, 2021-08-02 19:38:01, 70),
(1004, 8002, 2021-08-02 19:48:01, 90),
(1004, 8002, 2021-08-02 19:58:01, 94),
(1004, 8003, 2021-08-02 19:38:01, 70),
(1004, 8003, 2021-08-02 19:48:01, 90),
(1004, 8003, 2021-08-01 19:38:01, 80);INSERT INTO exam_record(uid,exam_id,start_time,submit_time,score) VALUES
(1001, 9001, 2021-09-01 09:01:01, 2021-09-01 09:31:00, 81),
(1002, 9002, 2021-09-01 12:01:01, 2021-09-01 12:31:01, 81),
(1003, 9001, 2021-09-01 19:01:01, 2021-09-01 19:40:01, 86),
(1003, 9002, 2021-09-01 12:01:01, 2021-09-01 12:31:51, 89),
(1004, 9001, 2021-09-01 19:01:01, 2021-09-01 19:30:01, 85),
(1005, 9002, 2021-09-01 12:01:01, 2021-09-01 12:31:02, 85),
(1006, 9003, 2021-09-07 10:01:01, 2021-09-07 10:21:01, 84),
(1006, 9001, 2021-09-07 10:01:01, 2021-09-07 10:21:01, 80);
2 数据分析 selectui.uid as uid,--每个6/7级用户总活跃月份数count(distinct act_month) as act_month_total,--2021年活跃天数 (总活跃天数 试卷作答活跃天数 答题活跃天数) count(distinct case when year(act_time) 2021 then act_day end) as act_days_2021,--2021年 试卷作答活跃天数count(distinct case when year(act_time) 2021 and tag exam then act_day end) as act_days_2021_exam,--2021年 答题活跃天数count(distinct case when year(act_time) 2021 and tag question then act_day end) as act_days_2021_question
from user_info ui left join ( select uid,start_time as act_time,date_format(start_time, %Y%m) as act_month,date_format(start_time, %Y%m%d) as act_day,exam as tagfrom exam_recordunion allselect uid,submit_time as act_time,date_format(submit_time, %Y%m) as act_month,date_format(submit_time, %Y%m%d) as act_day,question as tagfrom practice_record)ep
on ui.uid ep.uid
where ui.level 6
group by ui.uid order by act_month_total desc, act_days_2021 desc;
思路分析
step1: 试卷以开始答题时间作为活跃时间只要用户答题了就代表活跃不管有没有完成。先筛选出用户ID开始答题时间作为活跃时间开始答题的月份作为活跃月份开始答题的日期作为活跃天标记tag为examstep2题目以提交时间作为活跃时间先筛选出用户ID提交时间作为活跃时间提交的月份作为活跃月份提交的日期作为活跃天标记tag为questionstep3将上述两个筛选结果合并作为新表ep step4活跃信息在新表ep 中用户等级信息在user_info中因此在表user_info的右边去连接新表以uid为准。left join...on...step5从连接后的表中筛选出等级大于等于6的用户然后统计每个用户的活跃信息 3 小结
