Re: how to remove the duplicate elements from an array?

hello

try

create function uniq(anyarray)
returns anyarray as $$
select array(select distinct $1[i] from
generate_series(array_lower($1,1), array_upper($1,1)) g(i));
$$ language sql strict immutable;

postgres=# select uniq(array[1,2,3,1,2,3,5,2,2]);
   uniq
-----------
 {1,2,3,5}
(1 row)

regards
Pavel Stehule

2008/7/26 Yi Zhao <yi.zhao@alibaba-inc.com>:
> hi all:
> if I create an array '{44,55,66,c4,55,66,b4,55,66}',
> how to remove the duplicate elements(55, 66) from it, after remove, the
> array will be
> '{44,55,66,c4,b4}'
>
> thanks.
>
>
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