Local properties of query languages

Logics capturing local properties

ACM Transactions on Computational Logic (TOCL)

Logics with aggregate operators

Journal of the ACM (JACM)

Lower bounds for invariant queries in logics with counting

Theoretical Computer Science - Complexity and logic

Expressive Power of SQL

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

Expressive power of SQL

Theoretical Computer Science - Database theory

The finite model theory toolbox of a database theoretician

Proceedings of the twenty-eighth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems

On safety, computability and local property of web queries

APWeb'08 Proceedings of the 10th Asia-Pacific web conference on Progress in WWW research and development

A dichotomy in the intensional expressive power of nested relational calculi augmented with aggregate functions and a powerset operator

Proceedings of the 32nd symposium on Principles of database systems