Got it, thinks Jay.
On 5/6/10, Jay A. Kreibich <j...@kreibi.ch> wrote: > On Thu, May 06, 2010 at 05:10:31AM -0700, Matt Young scratched on the wall: >> OK, I got it. >> >> insert into seriesid >> select series_id,min(ROWID) from >> seriesdata group by series_id; >> >> This gets me a table with a pointer to the firs instance of series_id >> in the bigger table having multiple copies, it assumes that the ids >> are contiguous, allowing me to use offset, limit to extract just the >> date series I want. > > It would make a lot more sense to just query the seriesdata table with > a "WHERE series_id = :id" condition. You're writing SQL, but you're > still thinking in C. > > > > Also, you don't want to be using ROWID as the target of your foreign key. > In cases like this, setup an explicit INTEGER PRIMARY KEY, which will > act as a ROWID alias. > > The difference is that ROWIDs are not stable through a VACUUM, while > INTEGER PRIMARY KEYs are properly preserved. > > -j > > -- > Jay A. Kreibich < J A Y @ K R E I B I.C H > > > "Our opponent is an alien starship packed with atomic bombs. We have > a protractor." "I'll go home and see if I can scrounge up a ruler > and a piece of string." --from Anathem by Neal Stephenson > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
