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.

This book constitutes the refereed proceedings of the 10th International Workshop on Databases in Networked Information Systems, DNIS 2015, held in Aizu-Wakamatsu, Japan, March 2015.

The 14 revised full papers presented together with 7 invited papers were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on big data analysis, information and knowledge management, business data analytics and visualization, networked information resources, and business data analytics in astronomy and sciences.