How to make a SUM without group by
You need a to use a window function - http://www.postgresql.org/docs/9.3/static/tutorial-window.html
Something like:
(Sum(Auction) OVER ()) - actual AS Remaining
Idan is 100% correct. I want to provide an explanation of this:
(SUM (Auction) OVER ())OVER ()creates a window including all rows from the original query.SUM (Auction)is a window function that calculates the sum ofAuction.
Here is further explanation:
Window is a user-specified set of rows within a query result set.
Window Function computes a value (e.g.
SUM) over all rows in the window.All rows are in the window because
OVER()does not includePARTITION BY. WithPARTITION BYthe window would include a subset of rows.
...the OVER clause defines a window or user-specified set of rows within a query result set. A window function then computes a value for each row in the window. You can use the OVER clause with functions to compute aggregated values... if the OVER clause does not include PARTITION BY. This means that the function will be applied to all rows returned by the query.