how to get SUM from two different tables that are linked to third one

Question

ok the problem is that I have to sum two sums from two tables that are linked

first table points:

id | user_id | point | hit
1  | 1       |     4 | yes
2         


        

Answer 1

Try changing this

SUM( SUM(p.point) + SUM(e.earning) )

to

SUM(p.point) + SUM(e.earning)