I figured out a way to do this... rewrote my query as a nested select: UPDATE dest SET dest.field = (SELECT src.field FROM src, dest WHERE src.dest_id = dest.id);
Does SQLite support UPDATE statements with multiple tables or does one have to nest select statements to achieve this? Thanks, Audra On Fri, Nov 19, 2010 at 10:56 AM, Audra Rudys <sphin...@gmail.com> wrote: > This ought to be simple and yet... > How do I write the following query in web2py? > UPDATE dest, src > SET dest.field = src.field > WHERE src.dest_id = dest.id > > I only need to run it once. Tried via database administration module, but > the problem seems to be that the source and destination field names are the > same. > > Via code, if I write: > db(db.dest.src_id == db.src.id).update(field = db.src.field) > I get an error that SET doesn't know what to do. > > The syntax checker won't allow me to write (keyword can't be an > expression): > db(db.dest.src_id == db.src.id).update(dest.field = db.src.field) or > db(db.dest.src_id == db.src.id).update(db.dest.field = db.src.field) > > I tried to execute the query using executesql and got an error as well: > > Traceback (most recent call last): > > File "E:\web2py\gluon\restricted.py", line 188, in restricted > > exec ccode in environment > > File "E:/web2py/applications/octopus/models/db_octopus.py" > <http://127.0.0.1:8000/admin/default/edit/octopus/models/db_octopus.py>, line > 44, in <module> > > db.executesql('UPDATE db.page_content,db.work SET > db.page_content.created_by = db.work.created_by WHERE db.page_content.work_id > == db.work.id;') > > File "E:\web2py\gluon\sql.py", line 1451, in executesql > > self._execute(query) > > File "E:\web2py\gluon\sql.py", line 963, in <lambda> > > self._execute = lambda *a, **b: self._cursor.execute(*a, **b) > OperationalError: near ",": syntax error > > ... > > In case it's useful, variable a = ('UPDATE db.page_content,db.work SET > page_content....d_by WHERE db.page_content.work_id == db.work.id;',) > > > I've tried a few variations of the syntax, but still getting these errors. > Please help! > > Audra > >
