Question

How to get the sum of foreign key table as a value in the primary table row in a select statement?

Consider table 1:

id(PK)   name    description
-----------------------------

 1       test1      desc1
 2       test2      desc2

Table 2 is:

id(FK)    value
-----------------
 1         5
 1         6
 2         7
 2         8

The result for the SQL select statement should be like

id     name   desc    sum(value)
----------------------------------
 1     test1  desc1        11

Answer 1

select 
  t.*, 
  ( select 
      sum(tt.value) 
    from table2 tt 
    where tt.id = t.id) sum_value
from table1 

HTH