I have a table. I can show all the data of a colomn in my table using ',' in the same line. but I can't apply it distinctly. hepl please
This is tricky. One simple suggestion is to use select distinct
:
select listagg(col, ',') within group (order by col)
from (select distinct col from t) x;
However, that makes it difficult to calculate other aggregations (or to generate more than on listagg()
result). Another way is to use window functions in combination with listagg()
:
select listagg(case when seqnum = 1 then col end, ',') within group (order by col)
from (select t.*,
row_number() over (partition by col order by col) as seqnum
from t
) t
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