我希望通过合并用逗号分隔的类别来更新表，只要我们有重复的ID，例如：
ID Category
802 A
802 k
803 x
804 y
804 z
So here is the desired results that I would like to see after the update is run:
ID Category
802 A, k
803 x
804 y, z
由于