Zkuste použít DISTINCT takhle:
SELECT DISTINCT mycolumn FROM mytable
UPRAVIT:
Zkuste
select mycolumn, count(mycolumn) c from mytable
group by mycolumn having c = 1
Zkuste použít DISTINCT takhle:
SELECT DISTINCT mycolumn FROM mytable
UPRAVIT:
Zkuste
select mycolumn, count(mycolumn) c from mytable
group by mycolumn having c = 1