Question

id | group | text
1  | 1     | sadsd
2  | 1     | sdffs
3  | 1     | sdffs
4  | 2     | sdf
5  | 2     | sdfs
6  | 3     | sdfsdf
7  | 4     | 243
8  | 4     | dfgd

How can i get with SQL all group, but only one? I would like show:

group:
1
2
3
4

Other example:

id | group | text
1  | v     | sadsd
2  | b     | sdffs
3  | n     | sdffs
4  | v     | sdf
5  | v     | sdfs
6  | n     | sdfsdf
7  | m     | 243
8  | b     | dfgd

How can i get with SQL all group, but only one? I would like show:

group:
v
b
n
m

Answer 1

If you just want a list of all groups, you can use SELECT DISTINCT ..

SELECT DISTINCT `group` FROM yourTable;

If you want to select some additional data as well, you should use GROUP BY

SELECT `group` FROM yourTable GROUP BY `group`;