Hi! I tried this approach before, but it violates my "only run GET_DATA once" requirement :-(
Josef On 21.10.2014 21:15, Svein Erling Tysvær svein.erling.tysv...@kreftregisteret.no [firebird-support] wrote: > > > What about > > FOR WITH TMP(MyDateTime, MySum) as > (SELECT MIN(dateandtime), SUM(Value) > FROM gen_data(...)) > SELECT g.id, g.name, g.dateandtime, g.value, t.MyDateTime, tMySum > FROM gen_data(...) g > CROSS JOIN tmp t > > Of course, you may want a different join to CROSS JOIN. > > HTH, > Set > ________________________________________ > Fra: firebird-support@yahoogroups.com [firebird-support@yahoogroups.com] > Sendt: 21. oktober 2014 09:39 > Til: Firebird Support > Emne: [firebird-support] PSQL: Getting both aggregation and individual rows > > Hi! > > Is there a simple way to get an aggregation of some query as well as the > individual rows from within a PSQL? I.e., I have a stored procedure > GEN_DATA which produces individual rows (ID, Name, DateAndTime, Value). > I am processing the output of GEN_DATA in another stored procedure > PROCESS_DATA: > > FOR SELECT id, name, dateandtime, value > FROM gen_data(...) > INTO ... > DO ... > > Within this loop, I need the individual records, but I also need some > aggregations on them, i.e. MIN(dateandtime) or SUM(value). If I could > run GEN_DATA twice, then it would be easy (in the first run I would > calculate the aggregations, in the second run the individual values), > but I can't. If I could perform the processing in my application (rather > than the stored procedure), it would be easy, too (I would simply > traverse the result dataset of GEN_DATA twice), but again I can't do > that. Would Common Table Expressions or perhaps Derived Tables help me? > > Thanks, > > Josef > > ------------------------------------ ------------------------------------ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 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/
