data-modeling

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Foreign Key Constraints in Oracle

I have Entity Relationship Model (ERD) where entities IndividualCategory and TeamCategory relate to entity Category. Now I want to create tables in Oracle DB. I started like this:[详细]

2023-03-02 18:07 分类：问答
Data model for folders in Core Data

I\'m trying to implement a folders and items data model in Core Data. It will be displayed in a table view. I\'m using a \"listItem\" entity for the table view with these properties:[详细]

2023-03-02 01:33 分类：问答
How to model nested collection with one primary object

I\'m looking to model in an RDBMS a meeting which has several proposed times, but one will be chosen as the accepted or primary one. Something like:[详细]

2023-03-01 16:04 分类：问答
Database boolean attributes or FK to definition table?

In legacy code I\'ve reviewed, I\'ve found a data model that create boolean fields of relevant attributes where only one is expected to be true.For example:[详细]

2023-02-28 09:34 分类：问答
Content Version Control

I just starting a project, I would like to have a small content manager with version control. However I don\'t know what is the best way to model the database.[详细]

2023-02-27 11:04 分类：问答
Mapping two tables to one entity in Doctrine2

I\'m looking at using doctrine for an application I\'m working on - but after reading the documentation I\'m having trouble conceptualizing how to represent the database structure we have in terms of[详细]

2023-02-27 06:55 分类：问答
Differences between Data Vault and Dimensional modeling?

When modeling a data warehouse, is there any reason we should favor Data Vault over Dimensional modelling? 开发者_JS百科What are the major differences between these two?Dimensional modelling is in my[详细]

2023-02-26 14:24 分类：问答
Data modelling draft/quote/order/invoice

Im currently working on a small project in which I need to model the following scenario: Scenario Customer calls, he want an quote on a new car.[详细]

2023-02-25 22:50 分类：问答
Xcode consistency error: Setting the No Action Delete Rule... is an advanced setting

After creating a data model in Xcode, it\'s throwing the following error for each of the object relationships:[详细]

2023-02-24 03:33 分类：问答
Database Design: need unique rows + relationships

Say I have the following table: TABLE: product ============================================================[详细]

2023-02-22 05:19 分类：问答