The db structure of the Initial Database names the primarykeys as
<tablename>_id. I thing that should exist an paper with the db design
guidelines.
2006/8/12, Martin Marques <[email protected]>:
You're structure has redundant info in it. When I say redundancy, I saying
contacts.contacts_id should just be contacts.id (in table-column writing).
Also, you should use standard data types, not like using tinyint. Boolean
should be used there. OK, just checked that MySQL STILL doesn't have a
boolean data type. Is a 8bit data type the best way to deal with this?
Let's also add the INSERTs to the contact_info_type table (those are
application specific data).
On Fri, 11 Aug 2006, Michel Moreira wrote:
> Create table contacts (
> contact_id Int NOT NULL,
> changed Datetime,
> del Tinyint,
> name Varchar(128),
> email Varchar(128),
> firstname Varchar(128),
> user_id Int,
> Primary Key (contact_id)) ENGINE = MyISAM;
>
> Create table contact_info_type (
> contact_info_type_id Int NOT NULL,
> display_label Varchar(128),
> Primary Key (contact_info_type_id)) ENGINE = MyISAM;
>
> Create table contact_info (
> contact_id Int NOT NULL,
> contact_info_type_id Int NOT NULL,
> value Varchar(128),
> contact_info_id Int NOT NULL,
> Primary Key (contact_info_id)) ENGINE = MyISAM;
>
> Alter table contact_info add Foreign Key (contact_id) references
> contacts (contact_id) on delete restrict on update restrict;
> Alter table contact_info add Foreign Key (contact_info_type_id)
> references contact_info_type (contact_info_type_id) on delete
> restrict on update restrict;
>
> /*
> I think that the contact_info_type can hold the type of contact
> info, like organization, telephones, mother name :D and the
> contact_info has the ones that belongs to the contact.
> */
You mean, contact_info has the contact information. That looks good.
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Lic. Martín Marqués | SELECT 'mmarques' ||
Centro de Telemática | '@' || 'unl.edu.ar';
Universidad Nacional | DBA, Programador,
del Litoral | Administrador
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