Re: Remove Duplicate Words from a field

Hi Pavel,

Thanks for your code. I am using postgresql 8.3 so dont have unnest function in
my postgresql. But i found equivalend code for unnest in internet. Afterwards i
tried your code, and it worked !!

Thanks for the help ! you saved me from being a dead man.

Sukuchha

________________________________
Von: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
An: Sukuchha Shrestha <sukuchha(at)yahoo(dot)de>
CC: pgsql-general(at)postgresql(dot)org
Gesendet: Montag, den 16. Mai 2011, 15:06:14 Uhr
Betreff: Re: [GENERAL] Remove Duplicate Words from a field

Hello

2011/5/16 Sukuchha Shrestha <sukuchha(at)yahoo(dot)de>:
> Dear All,
> I am new to Postgresql. I have a field with lots of dublicate words and i
> want to remove any dublicate word from that field.
> For example, if i have a field with a string " one, one, two, two, three",
> how would i get " one, two, three" only ?
> Any help is much apprecieated !
> Sukuchha

postgres=# CREATE OR REPLACE FUNCTION uniq_worlds(text)
RETURNS text AS $$
SELECT array_to_string(ARRAY(SELECT DISTINCT trim(x) FROM
unnest(string_to_array($1,',')) x),', ')
$$ LANGUAGE sql;
CREATE FUNCTION
Time: 14.281 ms
postgres=# SELECT uniq_worlds('one, two, three, one');
uniq_worlds
─────────────────
three, two, one
(1 row)

Time: 0.817 ms

Regards

Pavel Stehule