I need to fetch the data from SQL Server based on the below condition.
In the database there are columns Ticketnumber and comments. For a Ticketnumber there are multiple records, for the same ticket number there are multiple comments stored in different records. Whenever I retrieve the ticketnumber and comments columns, the comments should be concatenated in the single record. 
Let's look at an example:
Ticketnumber       Comments        
-------------------------------
1002               Case raised    
1003               Case raised
1002               Processing,
1003               resolved
1002               resolved
Expected output should be:
Ticketnumber       Comments
-----------------------------------------------
1002               Case raise,processing,resolved,
1003               case raised,resolved  
All the comments should be concatenated for single ticketnumber as above.
Please provide the query. Thanks in advance
 
     
     
     
    