Groups > comp.lang.java.programmer > #2709

Re: ORM or JDBC?

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From	Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand>
Newsgroups	comp.lang.java.programmer
Subject	Re: ORM or JDBC?
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Date	Sat, 02 Apr 2011 15:44:11 +1300
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In message <LQslp.6717$sS4.1488@newsfe11.iad>, Arved Sandstrom wrote:

> A conceptual model equates to a business model. You might have entities
> for Person, Address, and LifeEvent, say. There is just enough
> information in the description of each to support a _business-level_
> discussion of relationships and identifying information and extra
> information.
> 
> It's in the logical model that, assuming we are talking about a
> relational logical data model, that we might say that Person has
> person_id as a primary key, that there's a M:N between Person and
> Address and we describe the join table, there's a 1:N between Person and
> LifeEvent, we specify exactly what the tables are and what columns
> exist, what columns are foreign keys, and so forth.

I still don’t see how you separate between “conceptual” and “logical”. One 
flows from the other; there is no boundary between them.

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Thread

Re: ORM or JDBC? Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-03-31 13:19 +1300
  Re: ORM or JDBC? Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-03-31 20:16 -0300
    Re: ORM or JDBC? Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-04-01 13:10 +1300
      Re: ORM or JDBC? Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-04-01 20:12 -0300
        Re: ORM or JDBC? Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-04-02 15:45 +1300
          Re: ORM or JDBC? Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-04-02 09:21 -0300
    Re: ORM or JDBC? Tom Anderson <twic@urchin.earth.li> - 2011-04-01 22:38 +0100
      Re: ORM or JDBC? Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-04-01 20:03 -0300
        Re: ORM or JDBC? Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-04-02 15:44 +1300
          Re: ORM or JDBC? Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-04-02 09:35 -0300
            Re: ORM or JDBC? Lew <noone@lewscanon.com> - 2011-04-02 10:25 -0400

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