entity-relationship
What is the significance of specifying a relationship as 'One to One' in JPA?
i created a class @Entity public class **Department** implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO)[详细]
2023-03-30 00:24 分类：问答How to get data from relationship objects in entity framework?
I have 2 Entity objects that i mapped in Entityframework I have relationship between users and Messages[详细]
2023-03-29 07:26 分类：问答How to model a database with many m:n relations on a table
I am currently setting up a database which has a large number of many-to-many relations. Every relationship was modeled via a link table. Example:[详细]
2023-03-28 07:36 分类：问答Performance: Core Data relationships get faulted after being assigned
I have a Core Data model representing a TV guide on iOS 4+, with 3 classes: Channel (BBC 1) Program (Top Gear)[详细]
2023-03-28 05:21 分类：问答Enitify Framework code first: Updating Entity With required related navigational property
My model looks like this public Class Address { public int Id {get;set;} /*Props here*/ } public Class Person[详细]
2023-03-27 22:42 分类：问答Does modeling entity-relationship using SQL Server built-in "Diagrams" have performance benefits on the execution of queries?
As database designing go I have never modeled the relationships of my tables by way of SQL Server diagrams, drawing how two 开发者_如何学编程or more tables are related using their primary and foreign[详细]
2023-03-27 19:11 分类：问答Multiple level dependency models in Zend Framework
I\'m developing an application in Zend Framework to handle the rentals for a commercial property rental company.The company has multiple buildings which each have multiple floors, which each have mult[详细]
2023-03-27 03:35 分类：问答Entity Framework Code First: Custom Mapping
p开发者_开发问答ublic class User { public int Id {get;set;} public string Name {get;set} public ICollection<User> Followers {get;set;}[详细]
2023-03-27 03:02 分类：问答Entity Framework: Model Contain A list(navigational properties) of three items of type= itself , giving error. (May be foreign key mapping error)
My Model looks like like this public class User { public int ID { get; set; } public string Name { get; set; }[详细]
2023-03-27 02:20 分类：问答Entity-relationship modeling for x-follows-y scenario
Assume there are two models: User and Question. I can use @OneToMany to indicate that one user can have multiple questions. Now if I want to allow user to follow one or more questions, should I build[详细]
2023-03-27 00:10 分类：问答
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