| 研讨会 (Seminars) | ||||
|---|---|---|---|---|
| ID | 标题 (title) | 费用 (cost) | 剩余名额 (places_left) | |
| 1 | Python 编程 (Python Programming) | 200 | 15 | |
| 2 | Linux 入门 (Intro to Linux) | 100 | 32 | |
| 3 | Socket 编程 (Socket Programming) | 475 | 7 | |
| 4 | Web 商务 (Web Commerce) | 300 | 26 |
| 参与者 (Attendees) | ||
|---|---|---|
| 姓名 (name) | 研讨会 (seminar) | 已支付 (paid) |
| Albert | 1 | 否 (no) |
| Albert | 4 | 否 (no) |
| Beth | 1 | 是 (yes) |
| Chuck | 2 | 否 (no) |
| Dale | 4 | 是 (yes) |
| Elaine | 3 | 是 (yes) |
| Elaine | 1 | 是 (yes) |
| Felix | 4 | 否 (no) |