1. A system, comprising: a first database management system (DBMS) comprising: a first database with a plurality of first tables, a first user management module configured to manage and check privileges of database users (DB-users) of the first DBMS, and at least one first stored procedure; a second DBMS comprising: a second database with a plurality of second tables, a second user management module configured to manage and check privileges of DB-users of the second DBMS, and at least one second stored procedure, the at least one second stored procedure configured to perform a computational task in the second DBMS; and a synchronization mapping configured to map at least a portion of the first tables to respective ones of the second tables, the system being configured for transferring data of at least some of the first tables to the respective ones of the second tables in accordance with the synchronization-mapping.