>I need something like this > >Name Date Days betwen Previous date >---------------------------------------------------------------------- >Name1 date1 0 >Name2 date2 date2-date1 >Name3 date3 date3-date2
I agree with Thomas in that EXECUTE BLOCK is probably the best solution, but an (inferior) alternative is: SELECT T1.Name, T1.MyDate, coalesce(T1.MyDate - (SELECT MAX(T2.MyDate) FROM MyTable T2 WHERE T1.MyDate > T2.MyDate), 0) FROM MyTable T1 The main reason for me calling it inferior, is that it will be slow for large tables without additional selective WHERE criteria for T2. HTH, Set ------------------------------------ ------------------------------------ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 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/
