Microsoft Access更新查询

Question

I am trying to make a insurance company database. I have a customer table where there is a field for their payment date, and also another field called PaymentTypeID which is linked to a PaymentType table. The ID is either 1 or 2 based on whether they pay monthly or annually. I have another table which is for policies where there is an effective date, the date of when their policy is expiring, so it should either expire in a month or a year.

What I want is a query to update the effective date from the payment date in the policy table based on whether their paymenttypeID is 1 or 2.

I would rather this be done in Design view rather than sql view

Thanks

Answer 1

You can use an IIf expression to set the value depending on the paymenttypeID. In the "Update To" row, use

= IIf(paymenttypeID = 1, valueToInsertIfPayedMonthly, valueToInsertIfPayedYearly)

Obviously, valueToInsertIfPayedMonthly and ...Yearly need to be replaced by the actual values that you want to set.

If you have more than two values, use the Choose function instead of IIf .