I have those two tables (Members and Now) I just need to make sure that no one in Members is actually in Now. Both tables have different structures but can be joined on firsname, lastname and postalcode.
So I tried this (in access)
SELECT Members.Prenom, Members.Nom, Members.Adresse, Members.[Adresse 2], Members.ville, Members.Province, Members.CodePostal
FROM Members
Left JOIN now ON (members.prenom = now.firstname AND members.nom = now.lastname
AND members.codepostal = now.postcode) WHERE now.id IS NULL
And it gives me a wonderful error message
invalid use of '.' ' ' or '()'. in query expression
May someone enlighten me on what I did wrong?