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Thread: [RESOLVED] Database design question

  1. Feb 16th, 2010, 05:40 PM #1
    MoE70
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    Resolved [RESOLVED] Database design question

    why do we make tables like 'Book_to_Author' instead of just adding authorID to the author field in the Book table?
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  2. Feb 16th, 2010, 05:44 PM #2
    si_the_geek
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    Re: Database design question

    You make tables like that when the join is many-to-many.

    In the case of a "'Book_to_Author" table, that would be because an Author can write many books, and a single book can be written by more than one person.
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  3. Feb 16th, 2010, 05:49 PM #3
    MoE70
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    Re: Database design question

    Ah that's it I remember now Thanks a lot!
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