On Mon, Sep 30, 2002 at 06:49:34PM -0400, Tom Lane wrote: | The other issue is what | to_date(...,'WWYYYY') should do to produce a date representing a week | number. Shouldn't it always produce the first date of that week? | If not, what other conventions make sense?
IMHO, it should choose the "Week Ending" date. This is usually what all of the companies that I've worked with want to see for the "day" column. For example, the defect^H^H^H^H^H^H quality reports at Ford Motor in 1993 used a Predo of part by defect by week-ending. Where week ending date was the Sunday following the work week (monday-sunday). In various project data in companies that I've worked with before and after 1993 I've yet to see a "weekly" report that didn't give the week ending... alhtough some did use Friday or Saturday for the week ending. One hickup with this choice is that you'd probably want the time portion to be 23:59:59.999 so that it includes everything up to the end of the day. Hmm. Clark ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
