Oracle wm_concat 函數說明 如：wm_concat(column) 欄位合并

shopping:

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u_id       goods            num

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1                蘋果                2

2                 梨子               5

1                 西瓜               4

3                 葡萄               1

3                香蕉                1

1               橘子                 3

=======================

想要的結果為:

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u_id          goods_sum

____________________

1              蘋果,西瓜,橘子

2              梨子

3              葡萄,香蕉

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select u_id, wmsys.wm_concat(goods) goods_sum  
  
 
  
from shopping  
  
 
  
group by u_id