>>>In your signature, you have "If you can't win them, lose them." My slogan is somewhat more agressive, "If you can't join them, beat them." <vbg>
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>>You surely meant two unjoinable tables in a SQL? So how do you beat them to have a foreign key into each other? Hold one hostage while the other goes across the border to smuggle a key? (we know domestic key won't work here)
>
>Yes, I mean one round table and one square table, they are very difficult to join. And I always use foreign keys, most of them are danish. Do you think I should try american keys and oval tables?

Once the talks at the round table were actually held around a square table, but it was more then compensated by serving drinks with spherical ice cubes.

American keys... are you sure you have American locks?

I think we can conclude with the rule of thumb: "if you can't unlock a record, that's because you aren't using the proper key - try with primary key first, that's why it's called primary".