Not updatble query

[Guest]

Dear all
I have the fowling query statement, returning a non updatable query.
I can not understand is it not updatable.

SELECT FacturaVenda.NIF, FacturaVenda.DocID AS Factura,
(nz([quantidade]*[preço]*(1+[iva]),0)-(nz([valor],0))) AS Divida,
Recebimentos.Valor, Recebimentos.Recibo
FROM (FacturaVenda LEFT JOIN Recebimentos ON FacturaVenda.DocID =
Recebimentos.Factura) INNER JOIN VendaArtigos ON FacturaVenda.DocID =
VendaArtigos.DocID
WHERE (((Left([FacturaVenda].[DocID],2))="ft")) OR
(((Left([FacturaVenda].[DocID],1))="N"));

I most appreciate if some one could explain what is the problem whit it.

 

[Guest]

It's the LEFT JOIN. It may be updateable if it's an inner join with one of
the fields being the table's primary key.

Even if it was just a single table, you wouldn't be able to update the
Divida field as it's a calculation.