Run Code  | Code Wall  | Users  | Misc  | Feedback  | About  | Login  | Theme  | Privacy 

string concatenation as aggregate operator in group by 

      
            
                
            		
        

        
        

            
                 run
                 | edit
                 | history
                 | help
            
            
                 
                        
                            
                            
                            
                              
                        
                    
                    
                        0