mysql隨機獲取n條數據

作秒殺時，碰到從秒殺商品中隨機取商品圖的問題，能夠用order by rand() limit *隨機取出*條記錄;web 例如：svg select gs.original_img from ecs_goods as gs where goods_id in( select goods_id from ecs_flash_sale where 1539323575 >= start_time a

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