Joe Celko's SQL for smarties: advanced SQL programming (2nd editor)

Temporal statement modifiers

ACM Transactions on Database Systems (TODS)

Expressive Power of SQL

ICDT '01 Proceedings of the 8th International Conference on Database Theory

Expressive power of SQL

Theoretical Computer Science - Database theory

Managing document taxonomies in relational databases

Effective databases for text & document management

On the development of name search techniques for Arabic

Journal of the American Society for Information Science and Technology

Semantic errors in SQL queries: A quite complete list

Journal of Systems and Software - Special issue: Quality software

Building a distributed digital library system enhancing the role of metadata

FDIA'08 Proceedings of the 2nd BCS IRSG conference on Future Directions in Information Access