This volume contains papers from the Fourth International Workshop on Database Programming Languages, which took place in Manhattan, New York City, USA, from 30 August - 1 September 1993. These workshops provide an important forum for discussion in a field which combines the key technologies for the future development of data-intensive systems. The papers focus on the development of novel programming languages, programming language features, environments for databases and data- intensive applications, and also the support of programming languages and environments by database systems. The volume begins with an invited paper by Tim Andrews (of Ontos Inc.) which examines important problems in the area, and discusses some probable future developments. Both new results and ongoing work are presented. The resulting volume will be invaluable to researchers and postgraduate students in the area of database programming languages.Beeri, Catriel is the author of 'Database Programming Languages (DBPL-4): Proceedings of the Fourth International Workshop on Database Programming Languages - Object Models and Languages, ... - 1 September 1993 (Workshops in Computing)', published 1994 under ISBN 9783540198536 and ISBN 3540198539.