--It can be quite easy to visually identify subtotals generated by rollups and cubes, but to do it programatically you really need something --more accurate than the presence of null values in the ...

For example, GROUP BY ROLLUP (col1, col2, col3, col4) creates groups for each combination of column expressions in the following lists.

The Global Biodiversity Information Facility (GBIF) has enabled a simple, easy-to-use service for creating and downloading species occurrence cubes based on GBIF-mediated data. The service enables ...