Why am I getting two PF & not one PF or FK using DeZign


S Hall
HOME ยป Access

Hi I am still learning this ERD stuff and am trying out DeZign for a MSSQL database and I thought I had PK and FK all figured out now im am reading about PF and trying to understand.
Reading about identifying I thought the CL_Address table should just have the "PK clAddressID" and "PF clClientID" as the Primary Key. Why is it adding the other PF key ??
EDIT: okay so I just realised in the CL_Client table the key is a combination of PK and PF I guess that is why.
So why bother with identifying relationship the non-identifying relationship seems do the same thing ???

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