Re: Split a string to rows?

Thanks a lot! I just noticed that my postgresql is 8.3(unnest function
is not there by default). Is there a way that I could download and load
only this function from somewhere?

Thanks again!
Emi

On 01/07/2013 02:58 PM, Jonathan S. Katz wrote:
> On Jan 7, 2013, at 2:44 PM, Emi Lu wrote:
>
>> Hello,
>>
>> Is there a function to split a string to different rows?
>>
>> For example, t1(id, col1)
>> values(1, 'a, b, c');
>>
>> select id, string_split_to_row(col1, ',');
>>
>> Return:
>> =========
>> 1, a
>> 1, b
>> 1, c
>
>
> You can probably use some combination of "string_to_array" and "unnest"
>
> e.g.
>
> SELECT unnest(string_to_array('a,b,c', ','));
>
> unnest
> --------
> a
> b
> c
> (3 rows)
>
> If you need a more complex string splitting mechanism, there is the "regexp_split_to_array" function.
>
> Jonathan
>

--
Emi Lu, ENCS, Concordia University, Montreal H3G 1M8
emilu(at)encs(dot)concordia(dot)ca +1 514 848-2424 x5884