On Thu, Aug 25, 2005 at 18:44:00 +0700, Richard Susanto <richard@xxxxxxxxxxxxxxxxxx> 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 ;
