I can\'t figure it out. How does CoreData implement JOIN known from SQL? Let\'s say I have EntityA (attr1, attr2) and EntityB(attr3, attr4).
I am making a .NET website which makes uses of a database to store information. It\'s a practice/experimental project not related to work or uni projects.
Hia, assumed I have a one to one or one to may relation. Lets say class Foo has a one to one reference to the managed class Bar.
Hia, got a one to many relation for chars and items. one char can hold a specific item, same item can be used by others.
What are the options for generating a graphi开发者_高级运维cal representation of my entities and their relationships in Google App Engine?
I am new to entity-relationship diagrams, but I am trying to plan out a concept for an app. Using Facebook as an e开发者_C百科xample, users can write comments on each other\'s walls, on their own wal
I\'ve seen a few examples of passing an :include hash value when calling one of ActiveRec开发者_开发技巧ord\'s find methods in Rails. However, I haven\'t seen any examples of whether this is possible
What is a better way to get related entities in scenarios like this: {class diagram here}? I wrote two ways (please also note the difference in class diagram)... Project has property with ICollection
I am trying to have a query in a method that looks like this: Public Shared Function listParticipationsByTeamCount(ByVal count As Integer, ByVal challenge As Challenge) As List(Of Pa开发者_运维技巧rt
i\'m ha开发者_StackOverflowving a little problem in my project. i\'m using ADO.Net Entity Data Model,
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