SQL to add a summary row to MySQL result set

Question

If I have a MySQL table such as:

I want to use SQL to calculate the sum of the PositiveResult column and also the NegativeResult colu

Answer 1

This should be handled at least one layer above the SQL query layer.

The initial query can fetch the detail info and then the application layer can calculate the aggregation (summary row). Or, a second db call to fetch the summary directly can be used (although this would be efficient only for cases where the calculation of the summary is very resource-intensive and a second db call is really necessary - most of the time the app layer can do it more efficiently).

The ordering/layout of the results (i.e. the detail rows followed by the "footer" summary row) should be handled at the presentation layer.