MS Access DDL：在关系视图中显示外键引用

Using an ADODB connection object, I am able to use SQL DDL with MS Access (joy!). The odd thing is that sometimes declared foreign key references show up in Access' Relationship View - this would be great for visualization, and to print off to show stakeholders - but sometimes it doesn't. For example, I create an Employees table, and a Dep_Policy table with a foreign key reference to Employees (example from Ramakrishnan book). This shows in the relationship view. I now create two new tables using the same DDL, but change the names to Cat and Dog, as a test. Only Dog shows in the Relationship view, not Cat. Here's the code:Using an ADODB connection object, I am able to