Hi, Simon, On Sat, Mar 23, 2013 at 10:22 PM, Simon Slavin <slav...@bigfraud.org> wrote: > > On 24 Mar 2013, at 5:03am, Igor Korot <ikoro...@gmail.com> wrote: > >> When application starts I need to retrieve first all available players >> and then all players that are drafted. >> >> Probably the easiest way would be to query playersinleague for all >> players and then query draftedplayers for all drafted players. > > That way should work. And your schema looks good too apart from SQLite > having no 'double' type. I recommend you store prices as integers instead. > >> But is it efficient? Is it fastest? > > Don't worry about either 'efficient' or 'fastest'. Just worry about 'fast > enough'. Generally speaking the best way to design your program is whatever > most resembles how you thought about solving the problem. If the program > works the way you think, it'll be easier to program and easier to debug. > > If you write it, and it's annoyingly slow to use, then yes, go into heavy > hacking mode and program for 10 hours to save 2 seconds runtime. But until > then it's wasted effort and hard to document. In real life, most programs > spend most of their time waiting for humans to do something. You can speed > something up by .84 seconds and nobody will ever notice. > >> I will probably need an index created on draftedplayers on the leagueid, >> right? > > Right. When making indexes do not think about "What columns would be good to > index." Instead think about "What kind of index would best suit that query > ?". So perhaps wait until you know more about the SELECT you'll be doing, > because you might find that it has an ORDER BY clause you can put into the > same index and speed it up even more.
What do you mean by "put ORDER BY clause in the index"? Could you clarify? Thank you. > > Simon. > _______________________________________________ > 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
