Oracle spliced into a string in the result set (effective pro-test)

Data Sheet Description

CLASS_ID	STUDENT_ID	STUDENT_NAME
101	1	Joe Smith
101	2	John Doe
102	1	Wang Wu
102	2	Zhao six

 

TO_CHAR method and use WM_CONCAT

SELECT
     WM_CONCAT(

              TO_CHAR(   

                     C.STUDENT_ID  ) 

                )   as    studentIDs

FROM

      T_CLASS  C

WHERE

     C.CLASS_ID = '101'

result:

   

studentIDs

1,2