Subselect from two tables problem
hi all
i have table c_movil
t_num number(15)
t_version number(2)
t_dmg number (9)
rable c_pay
tc_num number(15)
tc_vesrion nunber(2)
t_share number(11,2)
select count(*) from c_movil
1481
i need to fetch the 3 columns from c_movil and their sum(t_share) from
table c_pay
i did like this :
select a. t_num,a.t_version,a.dmg,sum(b.t_share) from
c_movil a ,c_pay b
where a.t_num = b.tc_num
group by a.t_num,a.t_version,a.dmg
giving me 1240 rows
apparently not all the t_num from c_movil appears in c_pay
but the problem is that i need to show all the t_num from c_movil
and according to that to show their sum(t_share) from table c_pay
so i need 1481 rows (if there are no rows for t_num in table c_pay it display null)
how shall i do it ?
thanks in advanced
This is outer join. And, it is denoted by '+'.
Kindly go through the following link ->
http://www.adp-gmbh.ch/ora/sql/outer_join.html
http://download.oracle.com/docs/cd/B14117_01/server.101/b10759/statements_10002.htm
Regards.
Satyaki De.
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