A method for providing visualization of data objects in a relational database is provided. The method comprises: (a) bringing an electronic device of a user in communication with a server comprising the non-hierarchical relational database, (b) generating and displaying a graph comprising visual graphical elements including a first node representing a first class encompassing a first subset of the data objects, a second node representing a second class encompassing a second subset of the data objects, and a link representing a relationship between the first class and the second class, (c) receiving a request via the user interface of the electronic device to perform a task directed to at least a subset of the data objects, (d) generating one or more filtering operations for the task and, upon execution, producing a graphical result comprising a filtered data set, and (e) automatically displaying the graphical result on the user interface.