------ hides information about the physical storage structures and focuses

on describing

data types, entities, relationships, etc.

------ indexing an ideal option for range or group by with max, min, count type queries.

To which of the data model type does the following demerit best attribute to: 

Schema is also called extension.

In ER diagram, place, person etc are denoted as -------------

Defining the role of an User is an example of ----------

The total number of attributes present in the relation is called -------------

Transitive dependency is eliminated as part of ---------

For a relation R (ABCD), if A -> B then AC -> BC. Which inference rule is this?

Data is not physically stored in the order of the index. Instead, data is present in leaf nodes in the case of ---------------