I have 2 entities in my Core Data database Person and Photo a Person has a To-Many relationship with Photo and Photo has a reverse relationship with Person (Person<-->>Photo). I load some ini
I\'m building a windows application in .Net 4.0 to create and organize electronics projects.The main purpose of the application is to record the vendor information for the electronics components (part
I have three tables - Context, Session and User. And below are their simplified structure. User: UserId (Int, PK)
I want to use Oracle SQL Developer to generate an ER diagram for my DB tables but I am new to Oracle and this tool.
Hi I use C# and EF 4. I have two Entities CmsContent and CmsJob. CmsJob has a navigational property to CmsContent.
I\'m calling same database from different applications using Entity Framework. However, when one application is reading/updating a record, I do not want other applications to read that data.
Would it be possible (or is it illegal for any reason) to have something like this: This is basically an ISA class with a foreign-key relationship to itself.
I am having trouble understanding how the entity groups and relationships work with GAE using JDO. The scenario I run is basically:
According to cascade deleting, i wrote below codes but there is an error : An error occurred while updating the entries. See the inner exception for details.
What exactly is meant by owned and unowned relationships? These terms are often used in JPA/JDO documentation, but I haven\'t found a good definition of th开发者_运维技巧em.In addition to Nix\'s anwse