On Thu, Jun 16, 2016 at 9:40 PM, Drago, William @ CSG - NARDA-MITEQ < william.dr...@l-3com.com> wrote:
> > On Behalf Of James K. Lowden > > > > create view vParts as > > select 1 as Matched, * from Parts > > UNION > > select 0, * from UnmatchedParts > Why UNION instead of UNION ALL here? Thanks to the 1 and 0, there can't be any dups, so the dedup step of UNION wastes cycles, no? > This helps a lot. Thank you. I would have never thought of this on my own. > I tried it, it works, and I like it. > Do try/compare your queries with the original table, and this new view fetching from two tables. The query optimizer might not "see" through to view well enough to get plans as good as on the single table. --DD _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
