SQL Server 选择列中的所有最大和最小数据

Question

+----+------+
| id | data |
+-----------+
| 1  |  a   |
| 2  |  b   |
| 3  |  a   |
| 3  |  c   |
+----+------+

I need to select data [a,b,c] .

Answer 1

Yes, got it. the query is 'SELECT distinct(data) from dataTable' Thanks.

Answer 2

Do you want the distinct values in the second column?

select distinct data
from t;