Detecting coherent explorations in SQL workloads

Performance Study on SharePoint Workloads in a SQL Server Environment

Detecting Semantic Errors in SQL Queries

We investigate classes of SQL queries which are syntactically correct, but certainly not intended, no matter for which task the query was written. For instance, queries that are contradictory, i.e. always return the empty set, are quite often written in exams of database courses. Current database management systems, e.g. Oracle, execute such queries without any warning. In this paper, we explai...

Detecting Logical Errors in SQL Queries

Queries that are contradictory, i.e. always return the empty set, are quite often written in exams of database courses. Although such queries are obviously not intended, they are executed in current database management systems (e.g., Oracle) without any warning. Of course, questions like the satisfiability are in general undecidable, but we give a quite simple algorithm that can handle a surpri...

Detecting Sql Injections from Web Applications

Most of the published attacks in the National Vulnerability database from the year 2007 to till date are on web attacks, statistically there are total 10134 CVEs published. Among them 1479 are sql injection flaws and 1569 are cross site scripting flaws and millions of attacks are not yet published. Very recent sql injection and cross site scripting attacks are on most famous websites such as No...

Coherent Filtering: Detecting Coherent Motions from Crowd Clutters

Coherent motions, which describe the collective movements of individuals in crowd, widely exist in physical and biological systems. Understanding their underlying priors and detecting various coherent motion patterns from background clutters have both scientific values and a wide range of practical applications, especially for crowd motion analysis. In this paper, we propose and study a prior o...