I need a list of
sales.product, sales.date, continent.name, sales.amount.sum()
with just one summed row per sales.product, sales.date,
continent.name !
basically a sales total per product, day and continent.
something like
Banana 20090520 Europe 123
Apple 20090520 Europe 234
Apple 20090520 Asia 456
db.define_table('sales',
SQLField('product'),
SQLField('date'),
SQLField('country','reference country',requires=IS_IN_DB
(db,'country.id','%(name)s')),
SQLField('amount','integer'))
db.define_table('country',
SQLField('name'),
SQLField('continent','reference continent',requires=IS_IN_DB
(db,'continent.id','%(name)s')))
db.define_table('continent',
SQLField('name'))
how should the web2py query/select look like?
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