ORACLE SQL pivot for non-aggregate like query

Question

I have a table which has data like :- id name data 1 a 10 1 b 20 1 c 30 2 d 40 2 e 50 Now, If I want to convert the rows into columns(giving them a unique name) and aggregate the data row (using xmlagg) ... How can I get output like

id name_1 name_2 name_3 data 1 abc 10,20,30 2 de 40,50

So basically convert rows into columns and rename them and aggregate the data related to them.

Answer 1

As an example: you can use listAgg or WM_Concat depending on version of Oracle

SELECt ID, wm_concat(data)
FROM Table
GROUP BY ID

you can also use a case statement but without knowing how you want to determine which names go in what of the 3 columns, I'm not hazarding a guess for it yet...

Answer 2

For this type of query, you need to generate a sequential number and then do conditional aggregation:

select id,
       max(case when seqnum = 1 then name end) as name1,
       max(case when seqnum = 2 then name end) as name2,
       max(case when seqnum = 3 then name end) as name3,
       list_agg(data, ',') within group (order by name) as data
from (select t.*, row_number() over (partition by id order by name) as seqnum
      from table t
     ) t
group by id;