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.stembridge@stripped> 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/
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