Re: Doubt about query - Mailing list pgsql-novice

Hi Bianca, 

What are you looking for, I think it is the "string_agg" function.

So for example the following query:

"Select string_agg(name, ', ') from table;"

will return "name1, name2, ....".

If you need top 5 rows you can add "limit 5" or other conditions you need.

Hope it helps.

On 05.06.2015, at 20:25, Bianca Stephani <bianca.stephani@gmail.com> wrote:

HI everyone. 

I have a table with X columns. And I want to make a select of 5 of the X columns in a way that i get all the 5 columns values only in one column (like i call everyone "AS bla" and as result, bla is an array of that columns), but if i use 5 selects with UNION ALL i just get [{bla => 3}, {bla => 3}, {bla => 1}, {bla => 5}, {bla => 2} ...] even with a GROUP BY. And besides that, using "as bla" is turning my results (3, 1, 5, 2) into strings.

What is the best way to collect the value of multiple integer columns as one? :|

Thanks.