Re: Union of multiple datasets
Thanks Jeremy. That works! On Friday, October 21, 2022 at 10:31:53 PM UTC+5:30 Jeremy Evans wrote: > On Fri, Oct 21, 2022 at 9:50 AM abhijit wrote: > >> Hi, >> >> I have multiple dataset queries. What would be the best way to create a >> union in this scenario? >> >> I have tried - >> >> ds1.union(ds2.union(ds3.union))) >> >> as well as >> >> ds1.union(ds2).union(ds3) >> >> In either case, the resulting SQL looks unnecessarily nested, although >> the results are identical. >> >> Is there a better way? >> > > You probably want: > > ds1.union(ds2, from_self: false).union(ds3, from_self: false) > > By default, unions are wrapped in a subselect so that filtering and other > changes on the resulting dataset works as expected. > > Thanks, > Jeremy > -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to sequel-talk+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sequel-talk/8ecafce7-613f-4d7a-84f3-16a61376d2edn%40googlegroups.com.
Re: Union of multiple datasets
On Fri, Oct 21, 2022 at 9:50 AM abhijit wrote: > Hi, > > I have multiple dataset queries. What would be the best way to create a > union in this scenario? > > I have tried - > > ds1.union(ds2.union(ds3.union))) > > as well as > > ds1.union(ds2).union(ds3) > > In either case, the resulting SQL looks unnecessarily nested, although the > results are identical. > > Is there a better way? > You probably want: ds1.union(ds2, from_self: false).union(ds3, from_self: false) By default, unions are wrapped in a subselect so that filtering and other changes on the resulting dataset works as expected. Thanks, Jeremy -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to sequel-talk+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sequel-talk/CADGZSSeyBSNNHoss%3Dg%2BPLHS5YRDEj5tL3q%2B0yVZcMi1zGBXsJQ%40mail.gmail.com.
Union of multiple datasets
Hi, I have multiple dataset queries. What would be the best way to create a union in this scenario? I have tried - ds1.union(ds2.union(ds3.union))) as well as ds1.union(ds2).union(ds3) In either case, the resulting SQL looks unnecessarily nested, although the results are identical. Is there a better way? Thanks, - Abhijit. -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to sequel-talk+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sequel-talk/c52ad11e-7b87-47db-8f14-e1be7388460dn%40googlegroups.com.
