Oracle 11g Release 2

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create table tbl1(
id number,
msisdn varchar2(10),
data varchar2(10)
)
create table tbl2(
id number,
line varchar2(10),
bytes varchar2(10)
)
insert all
into tbl1(id,msisdn,data) values(11,123,12)
into tbl1(id,msisdn,data) values(22,123,12)
into tbl1(id,msisdn,data) values(33,123,12)
into tbl1(id,msisdn,data) values(44,456,56)
into tbl1(id,msisdn,data) values(55,456,56)
into tbl1(id,msisdn,data) values(66,789,15)

into tbl2(id,line,bytes) values(1,123,12)
into tbl2(id,line,bytes) values(2,123,12)
into tbl2(id,line,bytes) values(3,456,12)
into tbl2(id,line,bytes) values(4,456,56)
into tbl2(id,line,bytes) values(5,456,56)
into tbl2(id,line,bytes) values(6,159,71)
select * from dual;
12 rows affected

select *
from tbl1 A
inner join tbl2 B
on A.msisdn = B.line and A.data = B.bytes

--group by B.line, B.bytes
--having count(*)>1


ID
MSISDN
DATA
ID
LINE
BYTES


33
123
12
1
123
12

22
123
12
1
123
12

11
123
12
1
123
12

33
123
12
2
123
12

22
123
12
2
123
12

11
123
12
2
123
12

55
456
56
4
456
56

44
456
56
4
456
56

55
456
56
5
456
56

44
456
56
5
456
56

ID	MSISDN	DATA	ID	LINE	BYTES
33	123	12	1	123	12
22	123	12	1	123	12
11	123	12	1	123	12
33	123	12	2	123	12
22	123	12	2	123	12
11	123	12	2	123	12
55	456	56	4	456	56
44	456	56	4	456	56
55	456	56	5	456	56
44	456	56	5	456	56

ID	MSISDN	DATA	ID	LINE	BYTES
33	123	12	1	123	12
22	123	12	1	123	12
11	123	12	1	123	12
33	123	12	2	123	12
22	123	12	2	123	12
11	123	12	2	123	12
55	456	56	4	456	56
44	456	56	4	456	56
55	456	56	5	456	56
44	456	56	5	456	56

ID	MSISDN	DATA	ID	LINE	BYTES
33	123	12	1	123	12
22	123	12	1	123	12
11	123	12	1	123	12
33	123	12	2	123	12
22	123	12	2	123	12
11	123	12	2	123	12
55	456	56	4	456	56
44	456	56	4	456	56
55	456	56	5	456	56
44	456	56	5	456	56