We consider the challenge of supporting KDD processes by means of queries. We introduce a research perspective, the so-called inductive database framework [4, 1, 3, 2]. An inductive database is a database that in addition to data contains intensionnaly dened generalizations about the data. Specifying and implement-ing inductive databases is a long-term perspective. However, more or less special-ized data mining query languages have been proposed, e.g., MSQL [7] or MINE RULE [5]. It is interesting to discuss whether they are good candidates for in-ductive database querying. Furthermore, the optimization of inductive queries is clearly related to constraint-based mining (see e.g., [6]). Considering the asso-ciation rule mining task, we can gu...