Hive collect_list-阿里云

【Hive】写出Hive中split、coalesce及collect_list函数的用法？

在 Hive 中，split、coalesce 和 collect_list 是常用的函数，用于字符串拆分、处理空值和集合操作。它们在数据处理和查询中具有重要的作用。接下来，我将详细解释每个函数的用法，并提供示例代码片段来说明它们的具体用法。 1. split 函数 split 函数用于将字符串按照...

Hive中collect_list()排序问题详解

来看一道互联网公司的面试题：有个用户好友表：字段如下 uid fans_uid score 返回：uid, fans_uid_list【fans_uid的拼接串，按照score降序拼接】给出数据源：每个uid，有很多对应的fans_uid，每个fans_uid 都对应一个scoreÿ...

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开源大数据平台 E-MapReduce

开源大数据平台 E-MapReduce（简称“EMR”）是云原生开源大数据平台，向客户提供简单易集成的Hadoop、Hive、Spark、Flink、Presto、ClickHouse、StarRocks、Delta、Hudi等开源大数据计算和存储引擎服务。

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立即开通

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优惠活动

StarRocks 免费试用

产品入门

快速入门指导

常见问题

最佳实践

EMR实时计算实践