Is there ever more than one order per day? I also think you might mean "most current order per product", but you didn't say that.
On Tue, Jan 27, 2009 at 8:38 AM, Adria Stembridge <adrya.stembri...@gmail.com> wrote: > I have a table like this: > > ID PRODUCT DATEORDERED > 1 5 2005-02-18 > 2 2 2008-03-13 > 3 2 2008-11-21 > 4 6 2009-01-21 > > A field has been added for current order to this table: > > ID PRODUCT DATEORDERED FLAGCURRENT > > I need to update all records in the table (about 400,000) so that the most > current order has FLAGCURRENT=1 (else 0). Is there an optimal way of doing > this with a single query? > -- Baron Schwartz, Director of Consulting, Percona Inc. Our Blog: http://www.mysqlperformanceblog.com/ Our Services: http://www.percona.com/services.html -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
