To be optimized, your WHERE clause expression needs to match an index expression.
trcask =UPPER( the search expression) Select * From winhst Where UPPER(serno)=trcask Order By invnum Into Table (myfile) See Using Rushmore Query Optimization to Speed Data Access in the VFP help. -- rk -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sytze de Boer Sent: Wednesday, February 09, 2011 2:00 PM To: [email protected] Subject: VFP9 - Speed Hi foxers I have a table called WINHST This table has 10 indexes The 7th index is on a field called SERNO. Expression is upper(serno) trcask = the search expression Select * From winhst Where serno=trcask Order By invnum Into Table (myfile) Question 1 In order to speed the search, should I do the following? sele winhst set order to 7 Select * From winhst Where serno=trcask Order By invnum Into Table (myfile) Question 2 Does the "order by" clause slow down the select issue ? -- Regards Sytze de Boer Kiss Systems --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- [excessive quoting removed by server] _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/DF1EEF11E586A64FB54A97F22A8BD04419222819F4@ACKBWDDQH1.artfact.local ** 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.
