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  1. mcjules1

    unique primary key

    Hello, I have different tables (let's say 3) in which I have a field that is called DID and that is my primary key. This field exists in the 3 tables; I'd like this field to be unique in my 3 tables. (I don't want the DID field to have the same value (this is an auto increment number) in any of...

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