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Hi :confused: I am trying to set up a query. i have to work out the cost of a phone call with the use of three fields-- i have: lenght of call, country call code-e.g england is +44(these are fields in my query) and then the cost per minute values for each country call code(but these are in a...

Hi, i'm trying to get a field to only allow data to be entered that is in a table e.g. i have a table which has a list of country dialling codes in it. In my form i want to only allow valid country codes to be entered-i.e. the ones which are in the table? Ive tried coming up with different...

I am trying to put in a validation rule so that data in one field cannot be less than that in another. e.g. i want to make a validation rule so that a phone call end time cannot be before the phone call start time. Can anyone help???