Category "group-by"

Python group by

Assume that I have a set of data pair where index 0 is the value and index 1 is the type: input = [ ('11013331', 'KAT'), ('9085267', 'NOT

Postgresql Multiple counts for one table

From two columns in my table I want to get a unified count for the values in these columns. As an example, two columns are: Table: reports | type