Aggregates for Entities
Aggregation is the process of reducing a list of values to a single value. Before aggregating, the list can be divided into chunks by grouping by a value. Here SPARQL is used to query and aggregate values.
To find the total population of all countries, first define a query that retrieves all country-population pairs.
To get the total population per continent, first define a query that retrieves, for all countries, both population and continent.
Then compose this query with an aggregate that specifies a group condition.
Make a Dataset.