MySQL多表查询一网打尽

现有四张表

mysql> select * from student;
+------+--------+-------+-------+
| s_id | s_name | s_age | s_sex |
+------+--------+-------+-------+
| 1    | 鲁班   |    12 | 男    |
| 2    | 貂蝉   |    20 | 女    |
| 3    | 刘备   |    35 | 男    |
| 4    | 关羽   |    34 | 男    |
| 5    | 张飞   |    33 | 女    |
+------+--------+-------+-------+
5 rows in set (0.00 sec)

student