just wondering why

[Guest]

hey all,

i was wondering why I've seen articles similar to the following:

ADO.NET Code Generator - Map DataBase Objects To .NET Classes

What does this subject accomplish? Like, this does this instead of doing
what? Please also give me an anology if possible.

thanks,
rodchar

 

[W.G. Ryan eMVP]

Relational database structures often don't match the objects that consume
their data in a completely clean manner.ORM tools intend to bridge that gap.
Take a Customer object that has multiple Phone numbers associated with it -
in a rdmbs you may have a customers table with a key to a phonenumbers table
and some indicator to differentiate between the phone types - ie cell, home,
business etc. There are a few different ways you could model this with
objects and ORM mappers are used to bridge this.

 

[Guest]

Could you please expand on your phone numbers example to futher explain how
ORM mappers bridge the gap? I'm still kinda lost in the gap. I apologize for
not getting it on the first try.