如何避免sql中的冗余属性？

Question

我目前有这张桌子。

name               title
Robert Pattinson   Twilight
Daniel Radcliff    NULL
Leonardo Dicaprio  NULL
Charlie Chaplin    The kid
Charlie Chaplin    The Circus
Charlie Chaplin    Timelight
John Abraham       Dhoom
John Abraham       Race 2

有没有办法避免像Charlie Chaplin这样的重复属性，并得到如下结果？

name               title

Robert Pattinson   Twilight
Daniel Radcliff    NULL
Leonardo Dicaprio  NULL
Charlie Chaplin    The kid, The Circus,Timelight
John Abraham       Dhoom,Race 2