This book constitutes the refereed proceedings of the 7th International Workshop on Databases in Networked Information Systems, DNIS 2011, held in Aizu-Wakamatsu, Japan in December 2011. The 18 revised full papers presented together with 6 invited talks and 1 keynote lecture were carefully reviewed and selected for the book.

This book constitutes the refereed proceedings of the 9th International Workshop on Databases in Networked Information Systems, DNIS 2014, held in Aizu-Wakamatsu, Japan, March 2014. The 21 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers are organized in topical section such as big data and cloud computing; astronomical data management; business data analytics and visualization; business data analytics in sciences; geo-spatial decision making and query languages; business data analytics in astronomy.