SQL PL SQL - Group By

Question

Hi All,
Thanks for your time in advance. I have situation where I need to group amounts by different field but one of the fields need to be re-organized. Not sure, how to better explain this in text. But, please see below example. Using 11g
SELECT 80 AMOUNT, 111 ACCOUNT_NUM, 123 CHECK_NUM FROM DUAL
UNION ALL
SELECT 100 AMOUNT, 111 ACCOUNT_NUM, 124 CHECK_NUM FROM DUAL
UNION ALL
SELECT 120 AMOUNT, 111 ACCOUNT_NUM, 125 CHECK_NUM FROM DUALDesired Result:
AMOUNT  ACCOUNT_NUM     CHECK_NUM
200                 111                     123,124,125Thanks

Answer 1

788729 wrote:
Using 11g11g is not clear enough. If it is 11.2, use LISTAGG:
WITH T AS (
           SELECT 80 AMOUNT, 111 ACCOUNT_NUM, 123 CHECK_NUM FROM DUAL UNION ALL
           SELECT 100 AMOUNT, 111 ACCOUNT_NUM, 124 CHECK_NUM FROM DUAL UNION ALL
           SELECT 120 AMOUNT, 111 ACCOUNT_NUM, 125 CHECK_NUM FROM DUAL
SELECT  SUM(AMOUNT) AMOUNT,
        ACCOUNT_NUM,
        LISTAGG(CHECK_NUM,',') WITHIN GROUP(ORDER BY CHECK_NUM) CHECK_NUM
  FROM  T
  GROUP BY ACCOUNT_NUM
    AMOUNT ACCOUNT_NUM CHECK_NUM
       300         111 123,124,125
SQL> SY.