1. A method for displaying information about a relational database comprising the steps of: identifying each relation of a plurality of relations in the relational database; determining for each relation a respective number of occurrences of a specific data item contained therein; determining for each relation a key structural characteristic which can be used to access that relation; categorizing each relation of the plurality of relations according to key structural characteristics of the respective relation; visually displaying the plurality of relations in categories according to the key structural characteristics thereof; visually displaying for each relation of the plurality of relations a respective bar that is representative of the number of occurrences of the specific data item contained therein; coloring each display of each relation that has the same key structural characteristic with a common color that is different from the coloring of the relations of the other key structural characteristics; visually displaying a cursor that is operator controllable over the display area; and changing the coloring of a visual display of a relation with which the cursor is actively contacting to indicate a selection thereof for a display of further information.