I want to do an inner join between a table a and another table b which contain 2 columns, and I want the key_service from table a equal to the key service element of variable key_service from table b and also equal to the element of variable parent_key_service from table b too. I solve this by doing two inner join and doing an union all between my tables but I want to do it directly, is it possible ? thank you
proc sql;
create table ca_m_service as
select a.month_key, a.service_key, a.tot_revenue, a.TOT_REVENUE_DISCNT, a.euser_key, b.*
from fr_dme.M_service_rev_by_euser_f as a
inner join code_remise_ass as b
on a.service_key = b.service_key
inner join code_remise_ass as c
on a.service_key = c.parent_service_key
where a.month_key between 201504 and 201509;
quit;