Ok , can you tell what exactly you  need to export? is it grade or user? 

Some demo data, including student activity logs/analytics, and grades that can be exported in CSV format are available from the "Mount Orange" Moodle Demo Site: http://moodle.com/any-way-you-want-it-moodles-demo-sites/ 

Did you mean something different, or did you want more or "real" data perhaps?

hello,you may have to go to Association of Institutional Researchers(AIR) website.

just type Association of Institutional Researchers on Google search.You will find all the data-set you want

Thanks for your answer. Actually I am talking about integrating data mining tools in course management systems....My student followed the paper "Data mining in course management systems.Moodle case study and tutorial" by Cristóbal Romero *

, Sebastián Ventura, Enrique García published in Elsevier Science to get the technology to preprocess data and employ this dataset for knowledge discovery. But they failed to extract the data with some tools as described in the paper. 

Sorry the ignorance. But how can I get a Moodle dataset (backup) for my research in the Association of Institutional Research (AIR) website?

Dear @Dr. Supratip Ghose,

I am also facing the same problem as the moment you posted this. So, I am wondering if did you managed to find "any open source moodle dataset for research purpose" or "anyone suggest me any tools to moodle web data in CVS format".

If yes. I would appreciate your kindly help. Because I need data for a research that I am work in.  In this research, I am developing a moodle plugin for predicting student's performance based on student usage data. 

Thank you

Dear Felermino Ali,

Thanks for your interest. Actually, People don't want to share the private data and that's why no one is eager to share the data in the context. Thanks for your interest.

Dear  Ijeoma Anumaka, Antonella Strambi 

Alas!! I can't find any Moodle Data in ARFF form from the sites you pointed. I am not looking for a Moodle implemented Site. Thanks for your understanding. 

Hello,

I'm also doing a research project about applying machine learning to moodle, but I'm having a lot of troubles to get valid data to use. Anyone has found any dataset? I will appreciate it very much.