Re: How to count the number of items in an Array?

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От Andre Lopes
Тема Re: How to count the number of items in an Array?
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Msg-id 18f98e681002210717o18fadb53ybef8259caabd86b8@mail.gmail.com
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Ответ на Re: How to count the number of items in an Array?  (Andreas Kretschmer <akretschmer@spamfence.net>)
Ответы Re: How to count the number of items in an Array?  (Andreas Kretschmer <akretschmer@spamfence.net>)
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One more time, thanks for the reply. I'am using postgre 8.3. I think I don't have the array_agg(), there is another way of doing it?
 
Best Regards,


 
On Sun, Feb 21, 2010 at 2:46 PM, Andreas Kretschmer <akretschmer@spamfence.net> wrote:
Andre Lopes <lopes80andre@gmail.com> wrote:

> Hi,
>
> Thanks for the reply.
>
> My problem is that I can't have the array with all items. I need to read from a
> table and store in an Array the values.

Not sure if i understand you, but how about:

test=*# select * from foo;
 a
---
 1
 3
 5
 7
(4 Zeilen)

Zeit: 0,203 ms
test=*# select array_agg(a) from foo;
 array_agg
-----------
 {1,3,5,7}
(1 Zeile)


The function returns a column as an array.



Andreas
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