On Jun 2, 2:04 pm, Thadeus Burgess <thade...@thadeusb.com> wrote:
> And for a given field...
>
> db(db.table.id > 0).update(field = None)

You can see all this in the "count / delete / update"  section of
http://www.web2py.com/book/default/section/6/5;

The behavior of truncate (i.e., resetting counter) is
http://www.web2py.com/book/default/section/6/4?search=truncate

and for unit tests, or development where you want to re-define a
table, there is:   db.my_table.drop()   (also in book, section 6/4).

Note that for update,  the selector is general,  e.g.
db( my_selector_clause ).update( field=value )

>
> --
> Thadeus
>
> On Wed, Jun 2, 2010 at 2:04 PM, Thadeus Burgess <thade...@thadeusb.com> wrote:
> > db.table.truncate()
>
> > --
> > Thadeus
>
> > On Wed, Jun 2, 2010 at 1:05 PM, Vasile Ermicioi <elff...@gmail.com> wrote:
> >> db(db.table.id > 0).delete()
> >> no sure what you mean by entries in a given field

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