Definitions for "Ad hoc query"
Keywords:  query, impromptu, sql, gis, inquiry
A query fashioned from all available data integrated into the GIS.
A request for information that is normally fabricated and run a single time and cannot be anticipated in advance. It consists of an SQL statement that has been constructed by a knowledgeable user or through a data access tool.
any query that is asked once, requiring search of an entire database.