On Sun, 21 Aug 2005, Tom Lane wrote: > Stephan Szabo <[EMAIL PROTECTED]> writes: > > I think something like: > > (CASE WHEN extract(dow from date) = 0 THEN 7 else extract(dow from date)) > > It's really not that hard: > > (extract(dow from date) + 6) % 7 > > You can rotate to any week-start day you like by substituting different > things for "6".
Yeah, mod is probably better and more general than case. It's still fairly ugly to require a non-trivial expression to get something that's consistent with the way that extract(week from date) works. ;) For anyone who is considering using this, to get an actual iso day of week, I think you'll need to add 1 at the end since that appears to use a 1-7 range. If you're just using it for sorting or the like, you can get away with not bothering. ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
