Oracle SQL put values of a column in one row -

I have a query returning 3 columns

  ID number 123 123A 124 2b 123 1c 123 1D   
 What I want to do is line it in  
  ID number 123 1A, C, D < / Code>  
 When I have the ID and NUMBER columns the same, there is a value and   
 
 
 In Oracle 11G, you can use the function:  
  select ID, number, list within the group (letter, ',') ( ID as the letter from the ED, number), number Apakatebl group;   
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