Hive 层次查询

使用窗口函数:NTILE SELECT cookieid, createtime, pv, NTILE(2) OVER(PARTITION BY cookieid ORDER BY createtime) AS rn1,--分组内将数据分红2片 NTILE(3) OVER(PARTITION BY cookieid ORDER BY createtime) AS rn2, --分组内将数据分红3片
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