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Special Edition Using Access 97, Second Edition by Roger Jennings

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Altering Fields and Relationships

When you are designing your own database, you often discover that you must alter the original choices that you made for the sequence of fields in a table, data types, or relationships between tables. One reason for adding substantial numbers of records to tables during the testing process is to discover any necessary changes before putting the database into daily use.

You can change formats, validation rules and text, lengths of Text fields, and other minor items in the table by changing to design mode, selecting the field to modify, and making the changes in the property boxes. Changing data types can cause a loss of data, however, so be sure to read the later section Changing Field Data Types and Sizes before ...

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