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Database Circular Reference

 
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Hi,

could somebody please explain what a database circular reference is, and what design shortcomings it has?

thanks,

Susan
 
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Table A has an FK to Table B. Table B has an FK to Table A. If I try to delete a record from Table A the delete will fail, because the record is referenced in Table B. If I try to delete a record from Table B the delete will fail because the record is referenced in Table A.
 
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