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Last Answered:
Mar 16 2008 5:10 AM GMT
by Mrdenny
When data is entered into a column of the wrong data type an error will be returned already.
For example is a column has the data type of INT and you try to put text data into the column the database will return an error message.
If you want a text field and you add a constraint to it and the new value does not meet the requirements of the constraint an error message will return an error message.