Converting rows into columns in db2 sql

Question

I have table subs_details sample data and columns like:

ID	Number
1	4579
2	5678
3	6678
2	7803
1	5479
3	5779

I want to convert it into below output:

ID1	id1_number	id2	id2_number	id3	id3_number
1	4579	2	5678	3	6678
1	5479	2	7803	3	5779

Please help in this

Answer 1

You may run it as is.

WITH 
  MYTAB (ID, Number) AS
(
VALUES
  (1, 4579)
, (2, 5678)
, (3, 6678)
, (2, 7803)
, (1, 5479)
, (3, 5779)
)
, MYTAB_NUMBERED AS
(
SELECT T.*, ROW_NUMBER () OVER (PARTITION BY ID) AS RN_
FROM MYTAB T
)
SELECT 
  1 AS ID1, T1.NUMBER AS ID1_NUMBER
, 2 AS ID2, T2.NUMBER AS ID2_NUMBER  
, 3 AS ID3, T3.NUMBER AS ID3_NUMBER
FROM (SELECT DISTINCT RN_ FROM MYTAB_NUMBERED) N
LEFT JOIN MYTAB_NUMBERED T1 ON T1.RN_ = N.RN_ AND T1.ID = 1
LEFT JOIN MYTAB_NUMBERED T2 ON T2.RN_ = N.RN_ AND T2.ID = 2
LEFT JOIN MYTAB_NUMBERED T3 ON T3.RN_ = N.RN_ AND T3.ID = 3

ID1	ID1_NUMBER	ID2	ID2_NUMBER	ID3	ID3_NUMBER
1	4,579	2	5,678	3	6,678
1	5,479	2	7,803	3	5,779