题目描述
题目描述
题解
题解
提交记录
提交记录
代码
代码
测试用例
测试用例
测试结果
测试结果
行 1，列 1
Players =
| player_id | player_name | | --------- | ----------- | | 1 | Nadal | | 2 | Federer | | 3 | Novak |
Championships =
| year | Wimbledon | Fr_open | US_open | Au_open | | ---- | --------- | ------- | ------- | ------- | | 2018 | 1 | 1 | 1 | 1 | | 2019 | 1 | 1 | 2 | 2 | | 2020 | 2 | 1 | 2 | 2 |