Обсуждение: Sorting CSV string and removing Duplicates

>
> I have a csv string in a text field that is unsorted and contains duplicates.
> Is there a simple way to remove these and sort the string.
>
> E.g
> 2,18,20,23,1,27,1,2,8,16,17,18,20,22,23,27
>

Do you need to eventually load the data in Postgres?

I'd personally use python to deal with this, we're talking 4 or 5 lines here,
if even. I suspect you can do the same with perl or ruby or whatever is your
weapon of choice.

How columns does your csv file has? Is it a one-line file?

--
http://yves.zioup.com
gpg: 4096R/32B0F416

> Hello,
>
> I have a csv string in a text field that is unsorted and contains
> duplicates.
> Is there a simple way to remove these and sort the string.
>
> E.g
> 2,18,20,23,1,27,1,2,8,16,17,18,20,22,23,27
>
> i tried string to array and unique but that did not work...
> Any suggestions on how to do this without writing a function?
>
> Any help is appreciated.
>
> Thanks
> A


chris=# SELECT distinct x::int from
unnest(string_to_array('2,18,20,23,1,27,1,2,8,16,17,18,20,22,23,27',
',')) x order by x::int;

 x
----
  1
  2
  8
 16
 17
 18
 20
 22
 23
 27
(10 rows)

Bye,
Chris.