Date: Thu, 25 Aug 2005 08:19:58 -0500
From: Bruno Wolff III <bruno@wolff.to>
To: Richard Susanto <richard@orbisindonesia.com>
Cc: pgsql-admin@postgresql.org, pgsql-sql@postgresql.org
Subject: Re: How this query!
Message-ID: <20050825131958.GD15100@wolff.to>
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	richard@orbisindonesia.com
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On Thu, Aug 25, 2005 at 18:44:00 +0700,
  Richard Susanto <richard@orbisindonesia.com> wrote:
> Folks,
> would you like help me how to query this case.

This question is off topic for the pgsql-admin list, it should have been
asked on the pgsql-sql list because it was a question about SQL. (I probably
wouldn't have said anything if it had been posted to the pgsql-general
or pgsql-novice lists, but it is definitely not a question even remotely
related to postgres administration.)

> 
> I have tbl_a, the fields are :
> item_record
> item_product_name
> item_qty
> 
> 
> if the data are :
> 
> item_record = 1,2,3,4,5,6
> item_product_name = a,b,a,c,d,c,...
> item_qty = 10,5,15,10,20,5,...
> 
> How the query to sum item_qty_total if i want the result :
> item_product_name = a,b,c,d
> item_qty_total = 25,5,15,20

Use GROUP BY item_product_name and sum(item_qty). Something like:

SELECT item_product_name, sum(item_qty) AS item_qty_total
  FROM tbl_a
  GROUP BY item_product_name
  ORDER BY item_product_name
;