DLookup() Compromises Form "Relationship"???

Aug 9, 2006

My db has 4 tables and forms
Table/Form 1 contains customer information: ID, Name, Address and Contact Numbers
Table/Form 2 contains vehicle information: ID, Vehicle Model, Plate Number, Chassis and Engine Numbers
Table/Form 3 contains insurance coverage data: ID, Plate Number, Policy Number and details of insurance coverages
And Table/Form 4 contains premium collection data: ID, Policy Number and details of payment

The underlined fields are the respective primary keys and relationship of each table.

I want the Plate Number on Table 3 to automatically change, once the user edits the same field on Table 2.
My concern is, if the customer has 2 or more vehicles or plate numbers, the DLookup function only takes up one plate number. How do I use this function without compromising the relationship of the form???

My other concern is the “=Right([PlateNumber],1)” function I used on my “Ending Plate Number” field. Data appears on the Form but if I look on the Table, data is missing.

Can’t figure these out! Please help..


Thank you!

Sheila

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[code]....

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