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From:Olaf Stein Date:February 9 2009 3:39pm
Subject:Re: db setup - correction
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Just about the authors

You need a separate table for them and then an table linking authors and

So you have table books, authors and rel_books_authors where rel_books
authors has 3 entries for a book with 3 authors just using the book id and
the author is's


On 2/9/09 10:25 AM, "PJ" <af.gourmet@stripped> wrote:

> being a newbie to mysql, I'm a little confused about how to deal with
> the following:
> I am creating a database of books and have come down to this - table for
> books (books) including fields for
> id (primary key, auto-incr.)
> title
> author (could be 2 or more)
> category (could be several - eg. youth, fiction, comics, and history,
> for same book)
> lang (eng, french, spanish, or german)
> descr (short summary, if avail.)
> comment (review(s))
> publisher
> pub_link (publisher's web addr. if avail.)
> bk_cover (image, if avail.)
> publish_date
> buy_link (if avail.)
> The other tables would be authors, categories, and buy_links.
> My problem is how to deal with several authors, categories, and links to
> sellers.
> What do I enter in the author field when I have several authors? Do I
> set up references to the author's name(s) in another table, like (3, 7,
> 23) each number representing the name of an author in another table?
> That is, .e.g. a number_id is entered in the author field in the books
> table; in the author table, I enter John Smith in the author_id field in
> the author table? Is the field for the author_id a foreign key?
> Same question for categories...
> buy_link - there are not many, but generally include an image and
> related info to be shown next to the books info (here, I suppose, just a
> few numbers will suffice to reference the table containing the
> information) and this field (buy_link_id) would be a foreign key (?)
> referencing the buy_link table?
> So, in a query (search) I would be doing joins from the books table to
> the author, category, and buy_link tables using foreign keys?
> But how do I deal with a search for a book by author? If there are, say,
> 3 authors (Red, White, and Blue) and the search is for White, the
> display should probably be formulated with a php function to display the
> book listing by book title (the standard display which includes all the
> relevant information about the book). So the search should first find
> the name of the author in the authors table and if it exists, then the
> author_id should reveal the ids for the relevant books and then these
> should be printed (or echoed) in the output. Gets kind of complicated
> doesn't it?
> Or would it all be simpler to just enter all the authors' names in the
> author field and then do a search for an author within the fields as a
> string? I suspect this would be rather slow. Also, same for categories
> and sellers since the whole database has to be searched?
> Am I on the right track? TIA

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db setupPJ9 Feb
  • Re: db setupOlaf Stein9 Feb
  • Re: db setup - correctionOlaf Stein9 Feb
    • Re: db setup - correctionPJ9 Feb
      • Re: db setup - correctionPeter Brawley9 Feb
        • Re: db setup - correctionOlaf Stein9 Feb
        • Re: db setup - correctionPJ9 Feb
          • Re: db setup - correctionOlaf Stein9 Feb
          • Re: db setup - correctionPeter Brawley9 Feb
            • Re: db setup - correctionPJ10 Feb
              • Re: db setup - correctionPeter Brawley10 Feb
                • Re: db setup - correctionPJ10 Feb
                  • Re: db setup - correctionPeter Brawley10 Feb
                  • Re: db setup - correctionddevaudreuil10 Feb
                    • Size limitation of user variable?Bryan Cantwell10 Feb
                      • Re: Size limitation of user variable?Baron Schwartz10 Feb
                        • Re: Size limitation of user variable?Johan De Meersman11 Feb
                          • Re: Size limitation of user variable?Baron Schwartz11 Feb
Re: db setup - correctionPJ10 Feb