Um tipo um tanto complicado de agregação:
with my_table (id, score_labels) as (
values
(1, '{"total": "High", "risk": "High"}'::jsonb),
(2, '{"total": "High", "risk": "Low"}'::jsonb),
(3, '{"total": "Low", "risk": "Medium"}'::jsonb)
)
select
jsonb_build_object(
'high', count(*) filter (where total = 'High'),
'medium', count(*) filter (where total = 'Medium'),
'low', count(*) filter (where total = 'Low')
) as total,
jsonb_build_object(
'high', count(*) filter (where risk = 'High'),
'medium', count(*) filter (where risk = 'Medium'),
'low', count(*) filter (where risk = 'Low')
) as risk
from (
select
score_labels->>'total' as total,
score_labels->>'risk' as risk
from my_table
) s
total | risk
------------------------------------+------------------------------------
{"low": 1, "high": 2, "medium": 0} | {"low": 1, "high": 1, "medium": 1}
(1 row)
