Concat the second column value if the first column value is same

Question

I have a query like below and listed output of it:

SELECT DISTINCT TRACKING_NUM,TITLE_OF_DOC_SEC 
FROM some_table  
WHERE  TRACKING_NUM IS NOT NULL;
<         


        

Answer 1

Use Listagg() in 11g or WM_Concat() in 10g:

   SELECT LISTAGG(TITLE_OF_DOC_SEC, ',') WITHIN GROUP (ORDER BY TRACKING_NUM) AS TITLE_OF_DOC_SEC 
     FROM your table
    WHERE....

   SELECT WM_CONCAT(TITLE_OF_DOC_SEC) AS TITLE_OF_DOC_SEC
     FROM your table
    WHERE....