> Il 07/03/2016 11.32, Dimitry Sibiryakov s...@ibphoenix.com > [firebird-support] ha scritto: >> sum(saldo) over (order by data) > > Thank You for your response but I can't do: sum(SALDO) because SALDO is > not a field of my table. > > I badly explained myself: I have a table with only this fields: > > DATA DOCUMENTO_ID NUMERO SERIE CARICO SCARICO > > > I need add SALDO fields in the result of the query to get a progressive > sum of CARICO - SCARICO.
Although not that flexible as an ad-hoc query, but perhaps your particular use case can be achieved with a selectable stored procedure ... I'm not good in writing PSQL out of my mind at the moment, but execute your SQL (without the SUM aggregate field) in a stored procedure, iterate over the result set, remember the computation for the previous row in a local variable and use that for the addition with the current row and call SUSPEND for each result set iteration. -- With regards, Thomas Steinmaurer http://www.upscene.com/ Professional Tools and Services for Firebird FB TraceManager, IB LogManager, Database Health Check, Tuning etc. ------------------------------------ ------------------------------------ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/firebird-support/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/firebird-support/join (Yahoo! ID required) <*> To change settings via email: firebird-support-dig...@yahoogroups.com firebird-support-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: firebird-support-unsubscr...@yahoogroups.com <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/
