System for inter-database communication

A system aggregates communication data. The system includes a client and a data access gateway. The data access gateway receives a single request from the client. The data access gateway composes a first query and a second query. The first query and the second query together satisfy the single request from the client. The data access gateway simultaneously routes the first query and the second query to a first database and a second database, respectively. The first database receives the first query from the data access gateway. The first database formulates a first response corresponding to the first query from the data access gateway. The first database provides the first response to the data access gateway. The second database receives the second query from the data access gateway. The second database formulates a second response corresponding to the second query from the data access gateway. The second database provides the second response to the data access gateway. The data access gateway aggregates the first response and the second response to produce a single aggregated response for the client. The aggregated response comprises data from both the first and second responses. The data satisfies the single request from the client.