SQL-如何选择为所有模块注册的学生姓名？

Student

学生

+------+-------+--------------------------------------+
| Sid  | sName | content                              |
+------+-------+--------------------------------------+
| 1    |  Tim  | ...                                  |
| 2    | boyo  | ...                                  |
| 3    | Carl  | ...                                  |
| 4    | Life  | ...                                  |
+------+-------+--------------------------------------+
+------+-------+----------------