id | device_id | gender | age | university | province |
1 | 2138 | male | 21 | 北京大学 | Beijing |
2 | 3214 | male | 复旦大学 | Shanghai | |
3 | 6543 | female | 20 | 北京大学 | Beijing |
4 | 2315 | female | 23 | 浙江大学 | ZheJiang |
5 | 5432 | male | 25 | 山东大学 | Shandong |
id | device_id | question_id | result | date |
1 | 2138 | 111 | wrong | 2021-05-03 |
2 | 3214 | 112 | wrong | 2021-05-09 |
3 | 3214 | 113 | wrong | 2021-06-15 |
4 | 6543 | 111 | right | 2021-08-13 |
5 | 2315 | 115 | right | 2021-08-13 |
6 | 2315 | 116 | right | 2021-08-14 |
7 | 2315 | 117 | wrong | 2021-08-15 |
question_id | difficult_level |
111 | hard |
112 | medium |
113 | easy |
115 | easy |
116 | medium |
117 | easy |
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