So in other words, to see it, it has to copy the data over and store it internally. A relational database doesn't have to do a copy, it can process the information by simply seeing it. As long as the information entered matches the validation specifications, everything goes along smoothly. However, when validation fails, FileMaker will allow you to present the user with a message you design or one of it's own messages will come up. See our afilemakeraffliction article on field validation to learn more.
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