Many to many relationship

[Dolphinesian]

Hi,

I've read a number of posts and tutorials but I can't quite figure this out.

I have two DBs. I'd like to be able to create a record in DB 2, and link it to multiple items in DB 1 but any record in DB 1 could be linked multiple times to items in DB 2.

E.g. If I have a requirements database, and tests database, I may need multiple multiple tests to verify one requirement, but I also may be able to verify multiple requirements with one test.

Thanks