To delete a relationshipDelete a relationship when you no longer want to relate columns in different tables. When you redesign tables, it is often necessary to delete relationships and then re-create them after your new design is complete. For example, if you decide to normalize a database and store all address data in one table, you can delete all the relationships to address columns between existing tables, create a new table containing the address columns, and then create relationships from the new address table to every table that requires an address.
Note When you delete a relationship, the relationship line is removed from your diagram and every other diagram in which it appears. It is deleted from the database when you save the diagram or either of the tables to which it is related.
To delete a relationship
