Re: tab_to_sting

On 07/24/2014 08:03 AM, Ramesh T wrote:
> I have try
> select string_agg(partname,':') from part_tab;    its return same,
>
> ERROR:  function string_agg(bigint, unknown) does not exist
> LINE 1: select string_agg(part_id,':') from part;

Try:

select string_agg(part_id::text,':') from part;

>                 ^
> HINT:  No function matches the given name and argument types. You might
> need to add explicit type casts.
>
> i  thought string_agg and array_agg same, is it right..?

No:

http://www.postgresql.org/docs/9.3/static/functions-aggregate.html

array_agg(expression)     any     array of the argument type     input values,
including nulls, concatenated into an array

string_agg(expression, delimiter)     (text, text) or (bytea, bytea)     same
as argument types     input values concatenated into a string, separated by
delimiter

>
>
>



--
Adrian Klaver
adrian.klaver@aklaver.com