mysql 选择所有同学名字

mysql> select * from test;
+----+----------+-------+-----------+
| id | name     | score | subject   |
+----+----------+-------+-----------+
|   | xiaoming |     | shuxue    |
|   | xiaohong |     | shuxue    |
|   | xiaohong |     | english   |
|   | xiaohong |     | physics   |
|   | xiaohong |     | astronaut |
|   | xiaoming |     | physics   |
|   | xiaoming |     | astronaut |
|   | xiaoming |     | english   |
|   | xiaobai  |     | astronaut |
|  | xiaobai  |     | english   |
|  | xiaobai  |     | physics   |
|  | xiaobai  |     | shuxue    |
|  | xiaohei  |     | astronaut |
|  | xiaohei  |     | shuxue    |
|  | xiaohei  |     | physics   |
|  | xiaohei  |     | english   |
+----+----------+-------+-----------+
 rows in set (0.00 sec)

mysql> select distinct(name) from test;
+----------+
| name     |
+----------+
| xiaoming |
| xiaohong |
| xiaobai  |
| xiaohei  |
+----------+
 rows in set (0.00 sec)