This book constitutes the thoroughly refereed post-proceedings of the 8th International Workshop on Database Programming Languages, DBPL 2001, held in Frascati, Italy in September 2001. The 18 revised full papers presented together with an invited paper were carefully selected during two rounds of reviewing and revision. The papers are organized in topical sections on semistructured data; OLAP and data mining; systems, schema integration, and index concurrency; XML; spatial databases; user languages; and rules.