This book constitutes the refereed proceedings of the 26th British National Conference on Databases, BNCOD 26, held in Birmingham, UK, in July 2009.The 12 revised full papers, 2 short papers and 5 poster papers presented together with 2 keynote talks, 2 tutorial papers and summaries of 3 co-located workshops were carefully reviewed and selected from 33 submissions. The papers are organized in topical sections on data integration, warehousing and privacy; alternative data models; querying; and path queries and XML;data mining and privacy, data integration, stream and event data processing, and query processing and optimisation.

This book constitutes the refereed proceedings of the 26th British National Conference on Databases, BNCOD 26, held in Birmingham, UK, in July 2009.The 12 revised full papers, 2 short papers and 5 poster papers presented together with 2 keynote talks, 2 tutorial papers and summaries of 3 co-located workshops were carefully reviewed and selected from 33 submissions. The papers are organized in topical sections on data integration, warehousing and privacy; alternative data models; querying; and path queries and XML;data mining and privacy, data integration, stream and event data processing, and query processing and optimisation.