Best beginner resources for understanding the EAV database model? [closed]


Best beginner resources for understanding the EAV database model? [closed]



I'm doing some custom work with Magento, which has a database design based upon the EAV model, and I need some good resources/tutorials that explain the EAV database model. Please don't provide Wikipedia as a resource... I'm looking for something that teaches EAV in a friendly way for beginners.




Does an in-memory database also have a filesystem component?

1:



Splitting a Server Hosted Access Database


User's text in my database as a separate table or within other data


To improve a relation figure for a database

2:



How to improve a ERD
The friendliest thing you can do for a beginner is to teach them the down side of EAV..
How to model Open/Closed statuses in a database?
The up side of EAV is so seductive that a lot of newbies will dig a very big hole for themselves before they realize it.

. Hopefully the google search will reveal at least some of the down side..


3:


In a nutshell, EAV is optimized for getting data in, not getting data out.

But that might be an acceptable trade-off.

I managed a project that had to develop a general clinical trial data management system.

There could not be many common data elements because each trial needs to collect different data.

Capturing data was urgent; we had to develop data entry pages under pressure.

Reports are harder with EAV, but they're also less urgent, and with some clever thought they can be simplified a bit.

EAV has served us well.

.


4:


I found this guide to be the most helpful for Magento: http://alanstorm.com/magento_advanced_orm_entity_attribute_value_part_1 .


5:


You should check this article: The EAV/CR Model of Data Representation.. It describes EAV with Classes and Relationships, a more OO approach and not just a plain reference-key-value implementation..


6:


I found this article really helpful, it provides considerations and consequences associated with an EAV schema and to provide a basic framework for its implementation in SQL Server.. http://weblogs.sqlteam.com/davidm/articles/12117.aspx.


7:


See Dinua V, and Nadkarnia P.

Guidelines for the Effective Use of Entity-Attribute-Value Modeling for Biomedical Databases.

Int J Med Inform.

2007 ; 76: 769–779.

http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2110957.



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