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I got two tables in my database: user and call. User exists of 3 fields: id, name, number and call : id, ‘source’, ‘destination’, ‘referred’, date.
I need to monitor calls in my app. The 3 ‘ ‘ fields above are actually userid numbers.
Now I’m wondering, can I make those 3 field foreign key elements of the id-field in table user?
Yes – you can 😉
Just define all three foreign keys to refer to the
idcolumn inUser.