Hi villas,
thanks for your example but that delivers the wrong result. With your query
we get
name date amount
aaa 2016-01-15 15
bbb 2016-01-20 10
ccc 2016-01-25 29
The result with your data should be (perhaps with additional price column)
name date amount (price)
aaa 2016-01-15 15 10
bbb 2016-01-20 6 15
ccc 2016-01-25 25 20
I want the last/max val_date for each prop_id and the amount of this last
val_date; in your query you just select the max val_date and the max amount.
With
maxdate = db.prop_val.val_date.max()
rows1 = db().select(db.prop_val.prop_id, maxdate,
groupby=db.prop_val.prop_id)
I get the last date for each prop_id; but after that how do I get the
amount for that prop_id/date and combine this result with the name and
price for each prop (in the most simple way)?
stex
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