2. The system of claim 1 , wherein the first abstract query comprises a sub-query from a first step of a multi-step query, and further comprising: executing a second abstract query comprising a second sub-query from a second step of the multi-step query against both the second database and the first set of query results to produce a second set of query results.
2. The system of claim 1 , wherein the first abstract query comprises a sub-query from a first step of a multi-step query, and further comprising: executing a second abstract query comprising a second sub-query from a second step of the multi-step query against both the second database and the first set of query results to produce a second set of query results. 3. The system of claim 2 , the operation further comprising: transmitting the second set of query results to be incorporated into a third data abstraction model such that a third step of the multi-step query can be executed against a third database and the second set of query results.