I usually create an index for each individual field involved in my primary query for a table. Seems to work faster but I have no scientific evidence to prove it. Seems like I read somewhere that it's best for Rushmore to kick in. But I might have dreamed it all so buyer beware.
I'm prepared to be corrected. Paul Sent from my iPhone > On Nov 3, 2017, at 4:09 PM, [email protected] wrote: > > VFP9SP2 free table > > I've got a table with this structure: > > city c(30) > state c(2) > radius i > distance i > > My query is looking for city, state, and radius, to get back those whose > distance is <= InputParameter. > > select * > from MyTable > where city = m.tcCity and state = m.tcState and radius <= m.tiRadius > > Not sure if I should > index on city tag city > index on state tag state > index on radius tag radius > > or > > index on city + state + padl(allt(str(radius)),6,'0') tag MyTag > > ??? > > I know I can use SYS(3054) to get my answer but I'm getting ready to be away > from the office for a bit and was hoping someone knew the obvious answer. > Otherwise I'll run my testing later tonight. > > (At the very least, hopefully somebody learned about SYS(3054,x,y) today.) > [excessive quoting removed by server] _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://mail.leafe.com/mailman/listinfo/profox OT-free version of this list: http://mail.leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[email protected] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
