Mysql DISTINCT not working if I add another column

Question

mysql> select DISTINCT title, id from myadmins;

+------+------------+
| id   | title      |
+------+------------+
|    1 | admin      |
|    2 | stack      |
|           


        

Answer 1

You will get distinct (id, title) couples.

The row with id=1 and title=admin is different from the row id=4 and title=admin.

If you want only distinct titles from your table:

select DISTINCT title from myadmins;

+------------+
| title      |
+------------+
| admin      |
| stack      |
| jeff       |
+------------+