Metrics of relation operations

Metrics are summary or aggregated indicators that helps to evaluate picture of a relation in volume.

1. Number of records in left table

2. Number of records in right table

3. Number of records in left table that included in natural or right join

4. Number of records in right table that included in natural or left join

5. Number of records in natural join (result of joining of left and right tables)

6. Number of records in left residue

7. Number of records in right residue

8. Number of records in full residue

9. Number of records in left join

10. Number of records in right join

11. Number of records in full join