The following datatype or size property of <Tablename>.<Columnname> doesn't match <Tablename>.<Columnname>. (Visual Database Tools)

When creating a foreign key relationship, the data types and other properties of selected columns must match. Select a column with the same data types and other properties as the related column. The properties that must match are Data type, Length, Precision, Scale, and Collation.

See Also

Concepts

Error Messages in Visual Database Tools

Help and Information

Getting SQL Server 2005 Assistance