用于 jsonb 的 Postgres 聚合 function

Question

i want to aggregate postgres data, but i need where one query where i can use aggregate function for different datatype . Basically want to combine this two queries.

select browser_id, jsonb_object_agg(key, val)
from (
    select browser_id, key, sum(value::numeric) val
    from aggregated_browser_days, jsonb_each_text(geo_city)
    group by browser_id, key
    ) s
group by browser_id;

select browser_id, sum(pageviews) as total_pageviews,
       STRING_AGG(DISTINCT browser_family, ',') AS browser, 
       STRING_AGG(DISTINCT device_model, ',') AS device_model,
       SUM(timespent) as total_timespent, SUM(sessions) as session_count
from data
GROUP BY browser_id

Can anyone please guide me?? Thanks in advance

Answer 1

This data is coming from two different tables. So a JOIN seems like the right approach. Just in case the base tables contain different sets of browsers, I am suggesting a FULL JOIN :

select *
from (select browser_id, jsonb_object_agg(key, val)
      from (select browser_id, key, sum(value::numeric) as val
            from aggregated_browser_days cross join lateral
                 jsonb_each_text(geo_city)
            group by browser_id, key
           ) s
      group by browser_id
     ) bd full join
     (select browser_id, sum(pageviews) as total_pageviews,
             STRING_AGG(DISTINCT browser_family, ',') AS browser, 
             STRING_AGG(DISTINCT device_model, ',') AS device_model,
             SUM(timespent) as total_timespent, SUM(sessions) as session_count
      from data
      group by browser_id
     ) b
     using (browser_id)