I want to implement filtered navigation with postgres, but I'm not sure how to return the count of each value in multiple fields from the result set.
Example Schema:
id, name, status
for this query i'd want to see something like (doesn't have to mimic this structure):
name: [(Bob, 20), (Joe, 15), (Sue, 5)]
status[(active, 15), (inactive, 25)]
Check Grouping Sets
with t (name, status) as (values
('Bob', 'active'),('Bob', 'active'),
('Joe', 'inactive'),('Joe', 'active'),('Joe', 'active')
)
select json_object_agg(case g when 1 then 'name' else 'status' end,a)
from (
select jsonb_agg(jsonb_build_object(coalesce(name,status), total)) as a, g
from (
select name, status, count(*) as total, grouping(name,status) as g
from t
group by grouping sets ((name),(status))
) s
group by g
) s
;
json_object_agg
------------------------------------------------------------------------------------
{ "name" : [{"Bob": 2}, {"Joe": 3}], "status" : [{"active": 4}, {"inactive": 1}] }