My app has clients that each have a single billing profile. I\'m envisioning my app having a \"Client\" model with an attribute called \"billing_profile\" which would reference another model called \
I have a model class ServiceRequest < ActiveRecord::Base has_many :services accepts_nested_attributes_for :services
I have table A and Table B. Table B contains two columns, Name and ID. Table A contains several columns and a foreign key column pointing to B.ID called B_ID
I\'m trying to use foreign keys properly to maintain data integrity. I\'m not really a database guy so I\'m wondering if there is some general design principle I don\'t know about. Here\'s an example
I am using the ADO entity framework for the first time and am not sure of the best way of inserting db recored that contain foreign keys.
Is this a relationship that can be described in Ruby on Rails\' ActiveRecord model relationships? CustomerAddress
I have a database application in which a group is modeled like this: TABLE Group ( group_id integer primary key,
I have an entity A that has a foreign key of entity B: ent开发者_开发技巧ity A --> id, entity_a_name, foreign_key_entity_B
When I have an entity 开发者_Python百科that holds a reference to a singular entity I can create an EntityKey and assign that value to the EntityNameReference.Value property. It works perfectly and lik
@Entity @Table(name = \"BOOKTEST\") @NamedQueries({@NamedQuery(name = \"Booktest.findAll\", query = \"SELECT b FROM Booktest b\"), @NamedQuery(name = \"Booktest.findById\", query = \"SELECT b FROM Boo
加载中,请稍侯......