Don't worry about it, I was just kidding.

When you look at the help you will notice that REFERENCES is not optional, but I understand the text is a bit confusing.

Hugo

>Hi
>
>When reading the documentation it said
>
>

>ADD FOREIGN KEY [ eExpression5] TAG TagName4[FOR lExpression6] 
>Adds a foreign (non-primary) index to the table. The eExpression5 parameter specifies the foreign index key expression. The TagName4 parameter specifies the name of the foreign index tag. Index tag names can contain up to 10 characters.
>
>

>
>The phrase "(non-primary) index" is what caused me to think this might be possible so I apologize for the misleading subject. I was not certain from the start whether I had read the documentation correctly and so the reason for my question.