At 2011-02-09 19:59, Sytze de Boer wrote: >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)
No the fastest is: SET ORDER TO Select * From winhst Where UPPER(serno)=trcask Always match the index exactly >Question 2 >Does the "order by" clause slow down the select issue ? Not noticable unless plenty of records returned ****************************** * Dan Olsson * <mailto:[email protected]> * <http://www.dolittle.se> _______________________________________________ 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/[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.
