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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