小编emu*_*tol的帖子

我有3张桌子：

球员：

    mysql> SELECT * FROM players;
+-----------+---------+----------------------+----------------------+-----------------+------------------------------+-----------------------+---------------------+
| player_id | team_id | player_name          | player_jersey_number | player_position | player_email                 | player_contact_number | player_timestamp    |
+-----------+---------+----------------------+----------------------+-----------------+------------------------------+-----------------------+---------------------+
|         1 |       4 | Popoy Alfonso        |                    2 |                 | popoyalfonso@gmail.com       | 09263453234           | 2015-08-05 00:48:10 |
|         2 |       4 | Karlo Ripas          |                   10 |                 | karloripas@yahoo.com         | 09212354324           | 2015-08-05 00:50:03 |
|         3 |       4 | VHaughn Von          |                   32 |                 | von@outlook.com              | 09361234565           | 2015-08-05 00:51:00 | …