Access 2013-DlookUp

Question

I now have tried DLookUp , but I do not get the result I want.

My Situation: I am creating a database for a cinema. It includes tables named cinemas, movies, sold seats, price.

I have made a form where I can record a new "guest". I can select the ID of the Show and then I see the date and the time. I now have recorded some guests and now there should be less seats free. I want to show that on the same form as the one where I record new guests. I don't get up with the Dlookup .

I have made this query which calculates how many seats are left but I cannot put that into the form.

SELECT
    tbl_Vorstellung.ID_Vorstellung,
    tbl_Kino.Kino,
    Sum([tbl_Kino]![Sitzplätze]-[qry(02)PlätzeVerkauft]![AnzahlvonTicketNummer]) AS Ausdr1
FROM
    tbl_Kino
    INNER JOIN ([qry(02)PlätzeVerkauft]
    INNER JOIN tbl_Vorstellung
    ON [qry(02)PlätzeVerkauft].ID_Vorstellung = tbl_Vorstellung.ID_Vorstellung)
    ON tbl_Kino.ID_KINO = tbl_Vorstellung.FS_KINO
GROUP BY
    tbl_Vorstellung.ID_Vorstellung,
    tbl_Kino.Kino;

Answer 1

Save your working query as a new name, for this example MyQuery

Then use

DLOOKUP("Ausdr1", "MyQuery", "ID_Vorstellung=SomeValue AND Kino=SomeValue")

On your form. You'll have to put in the SomeValue values based on fields on your form, etc.