Have any MySQL query to Update/replace Group By table points into other MySQL Table

Question

I Filter the My (TableA - fields app_id, user_id, points, tr_type, description) using Below Query

select app_id, user_id,sum(case when tr_type = 'add' then points when tr_type = 'sub' then - points end) as points
from TableA
group by app_id, user_id;

In Resuts:

app_id  user_id  points
1          1a      10
1          1b      12
1          1c      3

Now I have another table (TableB)

app_id   user_id   points  desc
1          1a      0       text
1          1b      0       tet
1          1c      0       txt

now I need fast replacement query to update TableB point values which is groupby from TableA

Answer 1

You can use a inner join with subqiery for group by values

update tableB b
INNER JOIN (
    select app_id
        , user_id
        ,sum(case when tr_type = 'add' then points when tr_type = 'sub' then - points end) as points
    from TableA
    group by app_id, user_id

) t ON t.app_id = b.app_id
    AND t.user_id = b.user_id 
set b.points = t.points