entity-relationship

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Database design for multiple game variations

Hopefully the purpose of these tables will be apparent, but just in case here\'s a simple explanation: I basically wish to store the results of matches (8 ball pool etc.) but also log the results on a[详细]

2023-03-09 18:16 分类：问答
Why any class with EdmEntityTypeAttribute causes runtime error even if it's not used?

I created ADO.NET Entity Data Model. Let\'s say that it generated the code below: namespace MyEntities[详细]

2023-03-09 17:47 分类：问答
Create a Many to Many relationship in CRM 4 and 5 in C#

I need to create/define a Many to Many relationship between a Lead and a custom entity as well as between a Contact and a custom entity. I can\'t seem to find any code examples of 开发者_开发知识库wha[详细]

2023-03-09 15:12 分类：问答
Core Data Inverse Relationship Not Being Set

I\'ve got two Entities that I\'ll call A and B.They are configured with To-Many relationships in both directions, so A.myBs and B.myAs are both NSSets.[详细]

2023-03-09 07:03 分类：问答
Is there a good collection of entity relation or class models in different industries on the web?

Please let me开发者_运维问答 know if you have any ideas.[详细]

2023-03-09 04:51 分类：问答
One-to-Many with no back reference in sub-related entity

If I have one-to-many relation between two entities (ie. Post and Comment) and have my master class defined as:[详细]

2023-03-09 04:00 分类：问答
Facebook database design...why have a profile table?

See image below Since 1 account has 1 profile relationship, Why have a profile table? what is the purpose of the profile table, apart from storing the status. Why not include status in the Account t[详细]

2023-03-09 00:10 分类：问答
Navigation Property not loading when only the ID of the related object is populated

I am trying to establish a many-to-one relationship. The entity that represents the “many” has a navigation property pointing back to the parent entity. It looks like this:[详细]

2023-03-08 20:18 分类：问答
How to generate SQL tables from ER diagram in Power Designer 15? [closed]

Closed. This question is seeking recommendations for books, tools, software libraries, and more. It does not meet Stack Overflow guidelines guidelines. It is not currently accepting answers.[详细]

2023-03-07 08:03 分类：问答
Error 3004: Problem in mapping fragment starting at line [closed]

Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code nece[详细]

2023-03-07 06:45 分类：问答