combine multiple rows result in single row based on one column value - oracle

Question

I i want to combine multiple rows result into single row based on one column called type.
Ex say suppose i have below result from my query .
seqnum type name
456 SH Google2
456 CN transwork
123 SH partyshipper
123 CN consignee
Actual result i want is something like below table
seqnum consigneename shippername
456 transwork Google2
123 consignee partyshipper
Basically i want to get result like consignee name when type is CN and shipper name is when type is SH if its not both then i can add extra column with name just like otherparty.
I can get result and iterate result set and set value of object. but i think this will be better if we get formatted result in query only.can some one help in in getting this.
Thanks for the help.

Answer 1

Something like this usually helps; lines #1 - 7 represent your sample data. Code you need begins at line #8.
SQL> with test (seqnum, type, name) as
2 (select 456, 'SH', 'Google2' from dual union all
3 select 456, 'CN', 'transwork' from dual union all
4 select 123, 'SH', 'partyshipper' from dual union all
5 select 123, 'CN', 'consignee' from dual union all
6 select 999, 'XX', 'littlefoot' from dual
7 )
8 select seqnum,
9 max(case when type = 'CN' then name end) consigneename,
10 max(case when type = 'SH' then name end) shipppername,
11 max(case when type not in ('CN', 'SH') then name end) otherparty
12 from test
13 group by seqnum;
SEQNUM CONSIGNEENAM SHIPPPERNAME OTHERPARTY
---------- ------------ ------------ ------------
123 consignee partyshipper
999 littlefoot
456 transwork Google2
SQL>

Answer 2

Borrowing the query from #Littlefoot. You may also use PIVOT for this getting the expected result.
with test (seqnum, type, name) as
(select 456, 'SH', 'Google2' from dual union all
select 456, 'CN', 'transwork' from dual union all
select 123, 'SH', 'partyshipper' from dual union all
select 123, 'CN', 'consignee' from dual union all
select 999, 'OT', 'littlefoot' from dual
)
select * from test
pivot (
min(name) for type in
(
'SH' shippingname
, 'CN' consigneename
, 'OT' someother
)
)
;
SEQNUM SHIPPINGNAME CONSIGNEENAM SOMEOTHER
---------- ------------ ------------ ------------
999 littlefoot
456 Google2 transwork
123 partyshipper consignee

Answer 3

I'd self join the table and filter different types in each side of the join:
SELECT COALESCE(c.seqnum, s.seqnum) AS seqnum,
COALESCE(c.name, 'other') AS consigneename,
COALESCE(s.name, 'other') AS shippername
FROM (SELECT *
FROM mytable
WHERE type = 'CN') c
FULL OUTER JOIN (SELECT *
FROM mytable
WHERE type = 'SN') s ON c.seqnum = s.seqnum