- select goods_id ,concat (",",GROUP_CONCAT(optiona_id),",") from `lux_product_goods_property_val` group by goods_id
- https://blog.csdn.net/zjutke/article/details/53639836
【转】MySQL group by后的结果将每组某VARCHAR字段字符串连接起来
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转载自bigdragon.iteye.com/blog/2419750
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