Probeer DISTINCT te gebruiken zoals dit:
SELECT DISTINCT mycolumn FROM mytable
BEWERKEN:
Probeer
select mycolumn, count(mycolumn) c from mytable
group by mycolumn having c = 1
Probeer DISTINCT te gebruiken zoals dit:
SELECT DISTINCT mycolumn FROM mytable
BEWERKEN:
Probeer
select mycolumn, count(mycolumn) c from mytable
group by mycolumn having c = 1