[AccessD] MS Access Table Relationships

Possible reason:

The one-infinity symbols denote a parent-child relationship.  

When you changed  to one-to-one, the previous "many" tabled remained  the "child" for the 
purpose of cascade update/delete.   


Either that or it's a bug in the update process of the Relationship window :-)



On 13 May 2012 at 22:17, Benson, William (GE Global Re wrote:

> I am trying to understand the MS Access relationships window.
> 
> I have two sample tables, with just one field in them. MS seems to
> make a conclusion on the relationship type based on the field
> properties, as follows: 
> 
> (1) When the field I am trying to relate is indexed and no duplicates allowed, for both tables, it is one-to-one
> (2) When the field I am trying to relate is indexed with no dupes in one, and anything else in the other table, I get Many-to-One.
> (3) When neither field is indexed in such a way as to preclude duplicates, the relationship is "Indeterminate"
> 
> When I play with the field properties of the table in design view, the
> relationship type field in the Edit Relationship window updates right
> away. But the 1 symbol and the infinity symbol do not seem to update
> right away. I had non-unique indexes in the tables at one point,
> related them, then changed the tables to both have unique indexes on
> the field I was relating. The relationship type updated to one to one,
> but the infinity symbol was still there til I deleted the relationship
> and readded it. 
> 
> 
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