Python 如何拆分数据集

m0_64727301: group by 后不用聚合函数查询列，竟然还能得到结果，这什么鬼

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2301_76458498: 可以再分享一下代码么，链接过期了

SunnyRivers: 当然是可以的

feature_09: 能够创建两个广播变量么？