current community

your communities

more stack exchange communities

company blog
Stack Exchange Inbox Reputation and Badges
tour help
Dismiss
Announcing Stack Overflow Documentation

We started with Q&A. Technical documentation is next, and we need your help.

Whether you're a beginner or an experienced developer, you can contribute.

Sign up and start helping → Learn more about Documentation →
up vote 0 down vote favorite

Is it possible to modify the PostgreSQL Array_Agg functions so that it doesn't return values in the format: {x,y,z,}. Can I have it return just: x,y,z ?

share|improve this question
up vote 4 down vote accepted

Use string_agg(val, ',') for that. It returns a string with a delimiter of your choosing. (You need PostgreSQL 9.0 or later for that.

array_agg(val) returns an array - no big surprise there. And the curly braces are just standard notation for the text representation of an array.

In older versions you can substitute array_to_string(array_agg(val), ',').

Or: trim(array_agg(val)::text, '{}' - if the values do not start or end with curly braces.

share|improve this answer
up vote 4 down vote

If you are not on 9.0 yet (which has the already mentioned string_agg() function) you can use array_to_string() on the result of array_agg()

share|improve this answer
1  
Since the question just re-surfaced: string_agg() was introduced with 9.0. – Erwin Brandstetter Oct 25 '12 at 1:08
up vote 1 down vote

Use the STRING_AGG function:

SELECT
  STRING_AGG(name, ',')
FROM
  person;
share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.