How to convert Rows to different columns

Question

Hi All,
I am having a table address with the following data.
ID          REL_NAME     REL_RELATION  REL_PHONE
1---          kish_rel1---     wife---     1111
1---          kish_rel2---     sister---     2222
1---          kish_rel3---     brother---     3333
2---          ram_rel1---     brother---     4444
Now i want to display rows data into columns. See the output i want. Exactly, I dont know how many rows are there for each ID. It may increase or decrease.
ID          REL_NAME     REL_RELATION  REL_PHONE
1---kish_rel1---     wife---     1111---kish_rel2---     sister---     2222---kish_rel3---     brother---     3333
2---ram_rel1---     brother---     4444
Thanks in advance,
Pal

Answer 1

Hi,
I have found this is useful. But it is static. It wont work if we dont know the maximum number of rows present when grouped by ID.
Is there any other solution, which will give correct values, if we dont know the row count when grouped by ID.
SELECT hrid,
MAX(case when seq=1 then rel_name end) AS "rel_name1",
MAX(case when seq=1 then rel_relation end) AS "rel_relation1",
MAX(case when seq=1 then rel_phone end) AS "rel_phone1",
MAX(case when seq=2 then rel_name end) AS "rel_name2",
MAX(case when seq=2 then rel_relation end) AS "rel_relation2",
MAX(case when seq=2 then rel_phone end) AS "rel_phone2",
MAX(case when seq=3 then rel_name end) AS "rel_name3",
MAX(case when seq=3 then rel_relation end) AS "rel_relation3",
MAX(case when seq=3 then rel_phone end) AS "rel_phone3",
MAX(case when seq=4 then rel_name end) AS "rel_name4",
MAX(case when seq=4 then rel_relation end) AS "rel_relation4",
MAX(case when seq=4 then rel_phone end) AS "rel_phone4"
FROM (SELECT hrid, rel_name, rel_relation, rel_phone, ROW_NUMBER() over(partition by hrid ORDER BY hrid) AS seq FROM address)
GROUP BY hrid
Thanks,
Pal