Deleting a Unique Constraint

See Also

Delete a unique constraint when you want to remove the requirement for uniqueness for values entered in the column or combination of columns included in the constraint expression.

To delete a unique constraint

1. In your database diagram, select the table whose unique constraint you want to delete.
   
   
2. Right-click the table and select Properties.
   
   
3. Choose the Indexes/Keys tab.
   
   
4. Select the unique constraint from the Selected index list.
   
   
5. Choose Delete.

Caution   Choosing Delete will result in an action that cannot be undone without losing all other changes made to the database diagram. To undo this action, close this database diagram and all other open database diagrams without saving the changes.

The constraint is deleted from the database when you save the table or diagram.